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The 2020 USVI Integrated Water Quality Monitoring & Assessment Report intends to satisfy the USVI requirements of the Federal Clean Water Act Sections 305(b) and 303(d). Submitted by: Department of Planning & Natural Resources Division of Environmental Protection St. Croix (340) 773-1082 St. Thomas (340) 774-3320 Web: http://dpnr.vi.gov/ USVI Integrated Water Quality Monitoring & Assessment Report Department of Planning & Natural Resources Division of Environmental Protection Water Quality Management Program 2020 2020 USVI Integrated Report Table of Contents EXECUTIVE SUMMARY .................................................................................................................... 2 A. Introduction.................................................................................................................................... 2 B. Background Information ................................................................................................................ 5 1. Total Waters ............................................................................................................................... 5 2. Water Pollution Control Program ............................................................................................... 6 3. Cost/Benefit Analysis ............................................................................................................... 10 4. Monitoring Program ................................................................................................................. 12 5. Assessment Methodology ......................................................................................................... 30 6. Assessment Results .................................................................................................................. 41 7. Wetlands Program .................................................................................................................... 54 8. Trends Analysis ........................................................................................................................ 58 9. Priority Scheme for TMDL Development ................................................................................. 59 C. Ground Water Monitoring and Assessment .................................................................................. 60 D. Public Participation ...................................................................................................................... 60 E. References ................................................................................................................................... 61 Appendix A: 303(d) list ....................................................................................................................... 63 Appendix B: Combinations removed from the previous 303(d) list ...................................................... 75 Appendix C: Assessment Unit Priority Based on World Protected Areas ............................................. 81 List of Tables Table 1: Characteristics of Virgin Islands Watersheds and Islands ......................................................... 6 Table 2: Annual Value of Ecosystem Services ..................................................................................... 11 Table 3: Annual value of protection provided by coral reefs from flooding .......................................... 11 Table 4: Overview of monitored waters and assessment units .............................................................. 12 Table 5: Monitoring Stations ................................................................................................................ 12 Table 6: Unmonitored Waters .............................................................................................................. 25 Table 7: Waters with Fewer than Eight Samples .................................................................................. 27 Table 8: Application of Turbidity Exemption ....................................................................................... 29 Table 9: Water Quality and Assessment Criteria .................................................................................. 30 Table 10: Potential Data Gaps .............................................................................................................. 31 Table 11: Parameters Considered When Assessing Designated Use ..................................................... 34 Table 12: Summary of Assessment Results .......................................................................................... 41 Table 13: Ghuts of Interest in the U.S. Virgin Islands........................................................................... 56 List of Figures Figure 1: St. Croix Assessment Units ..................................................................................................... 4 Figure 2: St. John and St. Thomas Assessment Units ............................................................................. 5 Figure 3: Location of Monitoring Station STC-22A ............................................................................. 29 Figure 4: St. Croix Assessment Result Categories ................................................................................ 53 Figure 5: St. Thomas and St. John Assessment Result Categories......................................................... 54 Figure 6: St. Croix Assessment Units Intersected with Marine Protected Areas in blue ........................ 90 Figure 7: St. John & St. Thomas Assessment Units Intersected with Marine Protected Areas in blue ... 91 2020 USVI Integrated Report EXECUTIVE SUMMARY The 2020 U.S. Virgin Islands Integrated Water Quality Monitoring and Assessment Report is intended to satisfy reporting requirements under section 305(b) of the federal Clean Water Act. This report is also intended to satisfy the requirements of section 303(d) of the Clean Water Act by developing a list of impaired assessment units that will require total maximum daily loads, known as TMDLs. This report provides an assessment of the water quality conditions of the Virgin Island’s surface and ground water resources for the period covering fiscal year 2018 and fiscal year 2019 (October 1, 2017 through September 30, 2019). A. Introduction All waters of the U.S. Virgin Islands shall meet generally accepted aesthetic qualifications and shall be capable of supporting diversified aquatic life. The waters within the jurisdiction of the U.S. Virgin Islands include: all harbors, bays, streams, lakes, ponds, impounding reservoirs, marshes, water-courses, water-ways, wells, springs, irrigation systems, drainage systems and all other bodies or accumulations of water, surface and underground, natural or artificial, public or private, situated wholly or partly within or bordering upon the U.S. Virgin Islands, including the territorial seas, contiguous zones and oceans. This integrated report assesses the waterbodies near-shore and off-shore from the three major islands making up the U.S. Virgin Islands: St. Croix, St. Thomas and St. John. According to the current U.S. Virgin Islands water quality standards, the waters of the U.S. Virgin Islands exist in one of four classes: I, A, B and C. The geographical extent of the four waterbody classes, and the applicable water quality standards are found at the following website: http://dpnr.vi.gov/environmental-protection/water-quality-management/ Or, via navigation from http://dpnr.vi.gov Class “I” Waters: Waters included in this class can be either inland surface waters or inland groundwaters (Subclass IG waters). Inland surface waters can be fresh (Subclass IF Waters), or, saline or brackish (Subclass IBS Waters). Subclass Inland Fresh Waters (IF Waters) and Inland Brackish or Saline Waters (IBS Waters): Designated Uses: Maintenance and propagation of desirable species of wildlife and aquatic life (including threatened, endangered species listed pursuant to section 4 of the federal Endangered Species Act and threatened, endangered and indigenous species listed pursuant to Title 12, Chapter 2 of the Virgin Islands Code), and primary contact recreation. Subclass of Inland Groundwaters (IG Waters): Designated Uses: For use as a potable water source. Class I geographical delineation: Designated aquatic-influenced environments located within land boundaries. 2020 USVI Integrated Report Class “A” Waters Designated Uses: Maintenance and propagation of desirable species of aquatic life (including threatened, endangered and indigenous species) and primary contact recreation. Preservation of the unique characteristics of the waters designated as Outstanding Natural Resource Waters, waters of exceptional recreational, environmental, or ecological significance. The quality of these waters cannot be altered except towards natural conditions. No new or increased dischargers shall be permitted. Class A geographical delineation (Outstanding Natural Resource Waters): • Within 0.5 miles of the boundaries of Buck Island’s Natural Barrier Reef, St. Croix. • Trunk Bay, St. John. Class “B” Waters Designated Uses: For maintenance and propagation of desirable species of aquatic life (including threatened, endangered and indigenous species) and for primary contact recreation (swimming, water skiing, etc.). This class allows minimal changes in structure of the biotic community and minimal changes in ecosystem function. Virtually all native taxa are maintained with some changes in biomass and/or abundance; ecosystem functions are fully maintained within the range of natural variability. Class B geographical delineation All other waters within the jurisdiction of the U.S. Virgin Islands not classified as Class “A” or Class “C”. Those Class “B” waters not covered by color and turbidity criteria in section 186-4 (b)(2)(B)(ii)(j)(3) of the Virgin Islands water quality standards regulations include: (A) St. Thomas waters-Mandahl Bay (Marina), Vessup Bay, Water Bay, Benner Bay, and the Mangrove Lagoon. (B) St. Croix waters-Carlton Beach, Good Hope Beach, Salt River Lagoon (Marina), Salt River Lagoon (Sugar Bay), Estate Anguilla Beach, Buccaneer Beach, Tamarind Reef Lagoon, Green Cay Beach and Enfield Green Beach. (C) All non-marine waters defined as all Virgin Islands waters shoreward of the mean high- tide line. This caveat applies to the above waters which may have characteristics naturally outside of the limits prescribed by the Virgin Islands water quality standards regulations, and thus any exceedances would not represent a violation of standards. (D) All other Class “B” waters are covered by the color and turbidity criteria in section 186-4 (b)(2)(B)(ii)(j)(3) of the Virgin Islands water quality standards regulations. Class “C” Waters Designated Uses: For maintenance and propagation of desirable species of aquatic life (including threatened and endangered species listed pursuant to section 4 of the federal Endangered Species Act and threatened, endangered and indigenous species listed pursuant Title 12, Chapter 2 of the Virgin Islands Code) and for primary contact recreation (swimming, water skiing, etc.). This class allows for evident changes in structure of the biotic community and minimal changes in ecosystem function. 2020 USVI Integrated Report Evident changes in structure due to loss of some rare native taxa; shifts in relative abundance of taxa (community structure) are allowed but sensitive-ubiquitous taxa remain common and abundant; ecosystem functions are fully maintained through redundant attributes of the system. Figure 1: St. Croix Assessment Units Class C geographical delineation St. Thomas: (1) St. Thomas Harbor beginning at Rupert Rock and extending to Haulover Cut. (2) Crown Bay enclosed by a line from Hassel Island at Haulover Cut to Regis Point at West Gregerie Channel. (3) Krum Bay. St. Croix: (1) Christiansted Harbor from Fort Louise Augusta to Golden Rock, along the waterfront and seaward to include the navigational channels and mooring areas. (2) Frederiksted Harbor from La Grange to Fisher Street and seaward to the end of the Frederiksted Pier. (3) Hess Oil Virgin Islands Harbor (alternatively named HOVENSA Harbor). (4) Martin-Marietta Alumina Harbor (alternatively named Port Alucroix or St. Croix Renaissance Group Harbor). St. John: Enighed Pond Bay 2020 USVI Integrated Report Figure 2: St. John and St. Thomas Assessment Units B. Background Information 1. Total Waters The territory of the U.S. Virgin Islands comprises three major islands: St. Croix, St. John and St. Thomas. Taken together, the territory encompasses a total land area of approximately 136 square miles, or 110,000 acres (See Table 1) characterized by central mountain ranges and relatively small coastal plains. Peak elevations are 1,165 feet on St. Croix (Mount Eagle), 1,550 feet on St. Thomas (Crown Mountain) and 1,297 feet on St. John (Bordeaux Mountain). The islands are generally only 2 to 6 miles wide, with no land location far from the coastal waters. The focus in this report is the data from the main islands of St. Croix, St. John, and St. Thomas although several enclosed bays within the main islands’ watersheds include offshore islands and cays. The return of Water Island to the control of the Government of the U.S. Virgin Islands, after 50-some years of direct federal administration (first as a fort by the Department of the Army during the Second World War, and later as the responsibility of the U.S. Department of the Interior) raises the question of whether this area should be treated as a fourth island. For the purposes of the Water Quality Assessment, Water Island will be treated as another offshore cay or small inhabited island, such as Hassel Island or Great St. James because the area is small (less than 600 acres or one square mile), the estimated population is less than 200 permanent residents and the island is practically within St. Thomas Harbor. The offshore cays and small islands are an inherent piece of the natural heritage of the Virgin Islands. Additionally, as an economic asset, these offshore sites could be included within a broad eco-tourism program for the territory. Many government-owned cays have already been established as wildlife 2020 USVI Integrated Report reserves pursuant to Title 12 § 94(b)(2) Virgin Islands Rules and Regulations. A number are important seabird nesting sites, and several are important roosting areas. The surrounding waters of most of the cays and islands teem with marine life, providing food for seabirds and for the fish and shellfish sought by commercial and recreational fishermen. They are also popular dive sites, which are important to the local diving industry. There are no large freshwater lakes or ponds, and no perennial streams on any of the islands. Intermittent streams can only be seen after heavy rainfall or during the rainy season (May to November). The absence of large freshwater resources and perennial streams means that guts (watercourses) form the basis for watershed management in the territory. Relatively small salt ponds are also scattered across the three main islands. Table 1: Characteristics of Virgin Islands Watersheds and Islands St. Croix St. Thomas St. John Total Estimated Population 50,600 51,634 4,170 106,404 Land Area (square miles) 84 32 20 136 Land Area (acres) 53,499 17,489 12,323 83,311 Tidal/sub-tidal wetlands (square miles) 2.5 2.4 1.1 6.0 Coastal Shoreline 70.3 52.8 49.7 172.8 Embayments (square miles) 1.5 0.9 0.1 2.5 2. Water Pollution Control Program The U.S. Virgin Islands DPNR Division of Environmental Protection is entrusted with the task of monitoring the marine waters of the U.S. Virgin Islands and controlling the discharges into those waters. To accomplish this task, the Water Pollution Control Program includes the monitoring program, discussed in Section C.1 of this report, as well as the following sub-programs: • Territorial pollutant discharge elimination system permitting and compliance program • TMDL development and implementation program • Nonpoint source program a) Territorial pollutant discharge elimination system permitting and compliance program The territorial pollutant discharge elimination system, known as TPDES, permitting and compliance program is a federally delegated program which permits and regulates the discharge of pollutants from point sources into waters of the U.S. Virgin Islands (as defined in 12 V.I.R. & Regs § 184). TPDES permits are issued in accordance with Title 12, Chapter 7 §184-11 of the Virgin Islands Rules and Regulations, which states that “…no person shall discharge or cause a discharge of any pollutant without a TPDES permit having been issued to such person…”. TPDES permits require that point source 2020 USVI Integrated Report discharges of pollution be monitored by the permittee (facility), and the self-monitoring results are submitted to the DPNR and the U.S. Environmental Protection Agency. The TPDES program currently regulates discharges from sewage treatment plant outfalls (both public and private facilities), brine discharges from reverse osmosis, desalination (and other technology) freshwater production plants, industrial facility process water discharges, industrial facility storm water discharges, and storm water discharges from construction sites with over one acre of exposed soils. The DPNR conducts compliance inspections and monitoring at all facilities that have been issued TPDES permits on an annual basis to ensure compliance. There are three types of compliance inspections conducted at TPDES permitted facilities throughout the territory: compliance sampling inspections, compliance evaluation inspections and pump station inspections, which are conducted on a quarterly basis at the territory’s publicly owned treatment works. If a facility is repeatedly found to be in non-compliance with its TPDES permit or has been found to violate the U.S. Virgin Islands’ water quality standards, enforcement actions may be taken against the facility. The enforcement action usually outlines corrective actions necessary for the facility to return to compliance and, if deemed necessary, fines may also be assessed. Facilities that are enforced against are usually granted the opportunity to work closely with the Department to develop a compliance schedule that the facility will use to achieve compliance. b) TMDL development and implementation program Projects for the development of total maximum daily loads in the U.S. Virgin Islands are currently done through contracted projects by Tetra Tech, Inc. c) Nonpoint source program The nonpoint source management program goals for the reporting period remained consistent with that of previous years: to protect ground and coastal waters by mitigating both land and marine nonpoint pollution sources. Nonpoint source pollution, in the form of polluted runoff, impairs more water bodies than any other source of pollution in the U.S. Virgin Islands. Nonpoint source pollution in the U.S. Virgin Islands is caused by rainfall moving over and through the ground. As runoff moves, it picks up and carries away both natural pollutants and pollutants resulting from human activities. These pollutants include sediments, nutrients, pesticides and toxic substances such as hydrocarbons and heavy metals. Eventually these pollutants are deposited in wetlands, coastal waters and ground water. Two watershed-based plans have been substantially implemented: Fish Bay and Coral Bay. For the Fish Bay Watershed Management Plan, the St. John Virgin Islands Resource Conservation and Development Council proposed the following actions using funding from the National Oceanic and Atmospheric Administration: • Paving roadways and ditches; • Installing swales and a culvert; and, • Stabilizing cuts with gabion baskets. 2020 USVI Integrated Report In addition to the work accomplished under the initial project, NOAA funding provided supplemental resources to cover increased project costs, expand the number of sites targeted and expand project monitoring and evaluation (NOAA, 2012). These funds were provided because of the quality and timeliness of the work being accomplished in the Fish Bay area. The Estate Fish Bay Owners’ Association also provided money to add to the NOAA funding. Supplemental work included: • Paving roadways; • Installing concrete swales, riprap outlets, and headwalls; and, • Ditch and culvert cleaning. The Coral Bay watershed management plan was finalized in March 2008 to serve as a guide for developing ways to protect Coral Bay from sediment and stormwater pollution. The plan provides a comprehensive set of objectives and actions that address land use planning, protection and restoration of sensitive lands and aquatic buffers, better site design and construction techniques and effective stormwater management. In 2014, the Coral Bay Community Council finalized phase 2 of the watershed management plan, a turbidity and floatable debris management plan. The plans can be reviewed at https://onedrive.live.com/?authkey=%21AII9ljsjfiotin4&id=9F78A94DCD9236CE%2181153&cid=9F7 8A94DCD9236CE. The Coral Bay Community Council is currently working on its 2020 Coral Bay Watershed Management Plan 5-year update. Under Section 319 of the Clean Water Act, states, territories and tribes receive grant money that supports a wide variety of activities including technical assistance, financial assistance, education, training, technology transfer, demonstration projects and monitoring to assess the success of specific nonpoint source implementation projects. The territory’s program places a special emphasis on prioritizing Section 319 grant resources to address 303(d) listed water quality impairments attributed to nonpoint source activities. The DPNR uses a sub-award agreement that sets forth an appropriate allocation of responsibilities between the DPNR and the sub-recipient. The focus on a geographic area necessitates that implementation be based on cooperative partnerships among all levels of government within the region for management effectiveness. During fiscal year 2018, the DPNR continued monitoring the progress of the Coral Bay Community Council. The DPNR receives routine progress reports and invoices from the Coral Bay Community Council. The Virgin Islands Conservation Society Project and Sub-award Agreement Project Objectives were completed in fiscal year 2017. (1) Virgin Islands Conservation Society (Sub-award agreement number NPS-2016-02) funding amount $74,250.00 The Virgin Islands Conservation Society successfully compiled and reviewed existing watershed data, conducted watershed field assessments, developed a watershed assessment work plan, hosted numerous education outreach events, and developed and maintained a watershed project website and Facebook page. During the previous fiscal year 2017, the Virgin Islands Conservation Society completed project objectives including watershed modeling, identifying priority projects, presenting Watershed Management Plans and updating educational material based on final findings of the watershed assessment. The Virgin Islands Conservation Society submitted a final report and Smith Bay Watershed Management Plan in September of 2017. 2020 USVI Integrated Report (2) Coral Bay Community Council and the Virgin Islands Conservation Society (CBCC) (Sub-award agreement number NPS-2016-01) funding amount $74,250.00 In fiscal year 2017, the Coral Bay Community Council successfully secured two engineers that designed two storm-water best management practices in the Coral Bay Watershed, set up internal administration systems for grant management, issued press releases to announce the grant award and hosted a public forum at the Guy Benjamin Community Center. In fiscal year 2018, further tasks in the sub-award agreement completed included project permitting, construction, inspections, public education/outreach and project management. The workplan under this subaward was divided into five tasks (not chronological): project permitting and bidding, stormwater best management practices engineering, stormwater best management practices construction/implementation, public education & outreach, and project management. Under the permitting and bidding task, the Coral Bay Community Council put out request for proposals for construction contractors for projects in Johnny Horn Trail and Freeman’s Ground (plans and permits for these were obtained under separate grants from National Fish and Wildlife Foundation). For the engineering task, the Coral Bay Community Council contracted Davis Engineering to produce plans for a best management practice project in Spring Garden Flats neighborhood and provided preliminary advice and memo for Estate Eden. As part of permitting, the Coral Bay Community Council acquired a Coastal Zone Managment Repair & Maintenance permit waiver and a building permit for the Spring Garden Flats project. The Coral Bay Community Council worked with neighborhoods in Johnny Horn Trail and Freeman’s Ground to prepare for best management practices implementation projects in their neighborhoods. As of the end of September 2018, a contractor had been selected and property owners had raised necessary matching funds for best management practices implementation at Johnny Horn Trail and Spring Garden Flats when the Coral Bay Community Council had to stop work at the September 30th deadline. The implementation task was not completed; however, an extension was signed and put in place on October 1, 2018. The sub-award agreement expired at the end of fiscal year 2019; however, plans to renew and extend it for fiscal year 2020 are underway. It is expected that the work will be completed, and sub-award agreement closed out by the end of fiscal year 2020. (3) U.S. Virgin Islands Environmental Handbook Updates (funding amount $49,999) During fiscal year 2017, the Horsley Witten Group signed a professional service agreement to complete the two remaining portions of the Stormwater Standards and Design Manual by developing specific design criteria, maintenance requirements and typical plan details necessary for best management practices to meet stormwater standards. Tasks include: draft best management practices design criteria and design example; meeting and work sessions, submit monthly progress and financial reports and provide the final stormwater manual. The Horsley Witten Group has set up the environmental project website (http://www.horsleywitten.com/VIEPH/index.html), prepared the environmental handbook outline, began working on the draft best management practices Design Criteria and Examples and contacted the Stormwater Handbook Revision Working Group. Additionally, Horsley Witten submitted a draft of Chapter 2 of the Environmental Handbook which describes the construction and post-construction standards. Horsley Witten also started planning their first in-person meeting with the Storm Water Handbook Revision Group. 2020 USVI Integrated Report After the Hurricanes Irma and Maria, the contractor had difficulty in renewing key corporate documents needed to continue work under the contract, and the contract expired in December 2017. Subsequently, continued issues with renewing those corporate documents prevented the contract from being renewed to present. Horsley Whiten did update all documents to date and is working on revising the work plan and scope for a new contract that will be drafted in fiscal year 2020 and work completed before the end of fiscal year 2020. Permitting: The Earth Change permitting program is the primary mechanism to locate and address all land disturbing activities territory wide. The program is designed for residential and commercial development. The DPNR knows what land disturbances are happening throughout the territory, evaluates water quality trends based on the number of Earth Change permits issued in a watershed, and identifies where to implement nonpoint source controls to protect coastal and ground water resources. Earth Change is the best way for the U.S. Virgin Islands to use limited resources expeditiously. Overall, the total number of permits issued within the territory in fiscal year 2019 was 331. Enforcement Actions: In fiscal year 2019, the Earth Change permitting program issued two stop-work orders. The program relies on concerned citizens anonymously informing the program concerning earth work being performed without an earth change permit and sites that were permitted working outside the scope of the permit conditions. The U.S. Virgin Islands’ nonpoint source program is committed to continuing to make progress in fiscal year 2020 and has set the following annual goals and priority areas: • Continue restoring impaired waters and protecting healthy waters through the implementation of the U.S. Virgin Islands nonpoint source management plan; • Evaluate water quality trends based on the number of Earth Change permits issued in a watershed; • Provide educational materials and training on nonpoint source management; • Participate in other territory partnership programs that focus on nonpoint source pollution problems; • Educate homeowners, businesses and contractors regarding the Earth Change permitting process; • Develop a ranking procedure that qualifies proposals for Section 319 grant funds as acceptable projects to implement as alternatives to watershed-based plans; • Solicit annual request for proposal for projects that will develop watershed plans that will address nonpoint source pollution; • Work with local stakeholders to complete the Smith Bay/Water Bay Watershed-Based Plan; and • Work with local stakeholders to continue the Coral Bay Community Projects watershed implementation efforts. 3. Cost/Benefit Analysis a) Costs Results of water quality trend analysis for the U.S. Virgin Islands indicate that pathogen levels in coastal waters increased on the islands of St. Thomas and St. Croix from 2000 to 2008. The results are statistically significant and point to marinas and nonpoint sources as the most likely contributors of these pathogens. Failing onsite sewage disposal systems are likely to be significant nonpoint sources of 2020 USVI Integrated Report pathogen. Addressing these failing systems, along with improved management of marinas, may reverse the increasing trend seen in coastal pathogen levels (The Cadmus Group, 2011). The U.S. EPA estimates the average cost of developing TMDLs to be about $52,000, with a typical range of costs between $26,000 and over $500,000. (U.S. EPA, 2001). Since the 303(d) list includes 159 waterbody/pollutant combinations, the range of costs to develop the TMDLs would be $4.1 million to $79.5 million. According to the U.S. EPA’s Clean Watersheds Needs Survey 2012 Report to Congress (U.S. EPA, 2016), needs for point and nonpoint sources in the U.S. Virgin Islands total $38 Million. The figure from the Needs Survey represents the capital needs for up to a 20-year period as reflected in State and local planning documentation for publicly owned wastewater conveyance and treatment facilities, combined sewer overflow correction, and stormwater management and is a snapshot in time. The costs for TMDL development and capital needs are totals and have not been annualized. b) Benefits Tourism in the U.S. Virgin Islands accounts for a large revenue stream for the U.S. Virgin Islands. According to the Bureau of Economic Analysis (2019), estimated net foreign travel in 2018 totaled $888 million, even with a significant decline in tourism activity in the months following Hurricanes Irma and Maria. The economic value on an annual basis for ecosystem services in the U.S. Virgin Islands is summarized in Table 2. The values are taken from the report titled, The Economic Value of the Coral Reef Ecosystems of the United States Virgin Islands (Van Beukering et al., 2011). The total economic value for coral reef ecosystems in the U.S. Virgin Islands is estimated at $187 million per year. Table 2: Annual Value of Ecosystem Services Service Annual Value (in millions) Tourism 96 Recreation 48 Amenity value (beauty of views) of real estate 35 Coastal Protection 6 Commercial Fisheries 3 According to a different analysis, intact coral reefs provide the U.S. Virgin Islands with $47 million in annual flood protection benefits in the form of averted damages to property and economic activities (Storlazzi et al., 2019). The $47 million annual benefit is based on the value of economic activity provided by housing that is protected from flooding by U.S. coral reefs annually and the value of economic activity provided by commercial and industrial buildings protected by U.S. coral reefs annually. Table 3: Annual value of protection provided by coral reefs from flooding Island Number of people Buildings (2010 U.S. dollars) Economic activity (2010 U.S. dollars) St. Croix 278 18,021,883 21,325,668 St. John 3 527,814 323,358 St. Thomas 59 3,319,769 3,565,110 Total 47,083,602 2020 USVI Integrated Report Although the studies differ on the scope of annual benefits related to coral reef services, in both cases, the annual benefits exceed the estimated costs for TMDL development and the results from the needs survey Surface Water Monitoring and Assessment. 4. Monitoring Program The coastal water quality monitoring program is the primary mechanism for monitoring the U.S. Virgin Islands coastal water quality. The sampling locations on the fixed station network are monitored on a quarterly basis. The beach water quality monitoring program monitors up to 43 designated beaches throughout the territory on a weekly basis. The Ambient and Beach Programs data are used to make water quality assessments on which this Integrated Report is based. An overview of the monitored waters and assessment units is provided in Table 4. Table 4: Overview of monitored waters and assessment units Island # of Assessment Units Assessment Units Monitored # of Assessment Units each Class of Water falls under % of Total Total Class A Class B Class C St. Croix 84 36 1 29 6 43% St. Thomas 60 38 0 38 0 63% St. John 33 20 1 16 3 60% Assessment units not monitored were either missed during monitoring events or currently do not have monitoring locations within the geographic boundary. The ambient water quality monitoring program continues to be conducted throughout a fixed network of monitoring stations in embayments, nearshore and offshore territorial waters by U.S. EPA contractors. It is the aim of the DPNR to regain sampling/monitoring privileges and to reevaluate the network of monitoring stations to determine where improvements may be made. The beach monitoring program continues to be conducted throughout a fixed network of 43 designated beaches. A list of the associated monitoring stations for each assessment unit is provided in Table 5. Table 5: Monitoring Stations AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STC-01 Frederiksted, south B 0.0451 There are currently no monitoring stations within this assessment unit. VI-STC-02 Frederiksted Harbor C 0.035 STC-28 Frederiksted Pier, STC- 29 Frederiksted Public Beach, VI970611 F’sted (Fst. Target) 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STC-03 Lagrange subwatershed, offshore B 0.375 There are currently no monitoring stations within this assessment unit. VI-STC-04 Prosperity, nearshore B 0.1118 VI252619 Rainbow (Prosperity) VI-STC-05 Prosperity subwatershed, offshore B 0.5129 There are currently no monitoring stations within this assessment unit. VI-STC-06 Sprat Hall Beach B 0.0609 STC-30 Sprat Hall Beach, VI645288 Sprat Hall VI-STC-07 Creque Dam/Butler Bay B 0.529 There are currently no monitoring stations within this assessment unit. VI-STC-08 Hams Bay B 0.3144 There are currently no monitoring stations within this assessment unit. VI-STC-09 Davis Bay B 0.0522 There are currently no monitoring stations within this assessment unit. VI-STC-10 Hams Bluff B 0.5506 There are currently no monitoring stations within this assessment unit. VI-STC-12 Cane Bay B 0.0613 STC-32 Cane Bay, VI201013 Cane Bay VI-STC-13 Baron Bluff subwatershed B 0.3498 STC-31 Davis Bay, VI398766 Davis Bay VI-STC-14 Belvedere B 0.0557 There are currently no monitoring stations within this assessment unit. VI-STC-15 Northside subwatershed B 0.6109 There are currently no monitoring stations within this assessment unit. VI-STC-16 Salt River Lagoon, Marina B 0.0194 STC-33 Salt River Marina, STC- 33C Salt River Lagoon, Marina VI-STC-17 Salt River Lagoon, Sugar Bay B 0.3244 STC-33D Salt River Lagoon, Sugar Bay 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STC-18 Salt River Bay B 0.3229 STC-33A, B, E-J Salt River (Columbus Landing Beach), VI146901 Gentle Winds, VI558328 Columbus Landing VI-STC-19 Judith Fancy B 0.01 There are currently no monitoring stations within this assessment unit. VI-STC-20 Salt River Bay subwatershed, west B 0.2433 There are currently no monitoring stations within this assessment unit. VI-STC-21 Salt River Bay subwatershed, east B 0.8922 There are currently no monitoring stations within this assessment unit. VI-STC-22 Northcentral St. Croix HUC14, offshore B 23.61 STC-OFF4 North-2, STC-OFF11 North-4 VI-STC-23 St. Croix-By-the-Sea B 0.0727 STC- 34 St. Croix-By-the-Sea, VI738082 Pelican Cove VI-STC-24 Long Reef Backreef, west C 0.1153 STC-48 Long Reef Backreef, west VI-STC-25 Princess subwatershed, offshore B 0.4343 STC-35 Long Reef Forereef West VI-STC-26 Christiansted Harbor C 0.9601 STC-37 Christiansted Harbor Entrance West, STC-40 St. Croix Marine, STC-41 Gallows Bay, STC-42 Public Wharf, STC-43 Water Gut Storm Drain, STC-44 Protestant Cay Beach, STC-45 Christiansted Harbor, STC-46 WAPA Intake, STC-47 Mill Harbor Condominium Beach, STC-49 Long Reef Back Reef East, VI572166 Condo Row (Princess), VI359239 Protestant Cay VI-STC-27 Long Reef Forereef, east B 0.3149 STC-36 Long Reef Forereef East, STC-35A LBJ (Pump Station) Outfall 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STC-28 Altona Lagoon B 0.2337 There are currently no monitoring stations within this assessment unit. VI-STC-29 Christiansted Harbor, east C 0.1089 STC-1 Lagoon Recreational Beach, STC-39 Altona Lagoon Inlet VI-STC-30 Beauregard Bay B 0.2145 STC-2 Ft. Louise Augusta Beach, STC-38 Christiansted Harbor Entrance-East, VI213332 New Fort Louise Augusta VI-STC-31 Buccaneer Beach B 0.0166 STC-3 Buccaneer Hotel, VI651587 Buccaneer VI-STC-32 Altona Lagoon subwatershed, offshore B 0.6812 There are currently no monitoring stations within this assessment unit. VI-STC-33 Punnett Bay B 0.0576 VI610321 Shoy’s VI-STC-34 Punnett Point, east B 0.0223 There are currently no monitoring stations within this assessment unit. VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) B 0.0205 STC-4 Tamarind Reef Lagoon VI-STC-36 Green Cay Beach B 0.1017 VI563397 Chenay Bay Beach VI-STC-37 Southgate subwatershed, offshore B 2.2219 STC-5 Green Cay Beach VI-STC-38 Solitude Backreef B 0.9681 There are currently no monitoring stations within this assessment unit. VI-STC-39 Teague Bay B 0.1773 STC-8 Reef Club Beach, STC-9 St. Croix Yacht Club Beach, VI381319 Teague Bay (Reef) VI-STC-40 Teague Bay Backreef B 0.8547 STC-10 Cramers Park, VI351774 Cramer’s Park VI-STC-41 Buck Island Backreef A 0.7675 STC-6 Buck Island Backreef, STC-7 Buck Island Anchorage VI-STC-42 Buck Island Forereef A 3.3497 There are currently no monitoring stations within this assessment unit. 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STC-43 Solitude and Teague Bay subwatersheds, offshore B 18.822 There are currently no monitoring stations within this assessment unit. VI-STC-44 Northeast St. Croix HUC14, offshore. B 36.088 STC-OFF8 North-3 VI-STC-45 Isaac Bay B 0.0853 There are currently no monitoring stations within this assessment unit. VI-STC-46 Grapetree Bay B 0.0425 STC-11B Isaacs Bay Forereef VI-STC-47 Turner Hole Backreef B 0.2772 STC-12 Grapetree Beach, VI297470 Grapetree Beach VI-STC-48 Turner Hole subwatershed, offshore B 16.949 STC-OFF5 East-2 VI-STC-49 Madam Carty Backreef B 0.464 STC-13B Robin Bay VI-STC-50 Madam Carty, offshore B 3.5161 There are currently no monitoring stations within this assessment unit. VI-STC-51 Great Pond B 0.1578 There are currently no monitoring stations within this assessment unit. VI-STC-52 Great Pond Bay B 1.0184 STC-13A Great Pond Bay VI-STC-53 Great Pond Bay subwatershed, offshore B 3.0288 STC-OFF13 SE-4 VI-STC-54 Leprey Valley Backreef B 0.3712 There are currently no monitoring stations within this assessment unit. VI-STC-55 Leprey Valley subwatershed, offshore B 2.8455 There are currently no monitoring stations within this assessment unit. VI-STC-56 Bugby Hole Backreef B 0.7042 STC-14A Halfpenny Bay - Manchenil, STC- 14B Halfpenny Backreef, VI931289, Halfpenny VI-STC-57 Bugby Hole subwatershed, offshore B 3.9 There are currently no monitoring stations within this assessment unit. 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STC-58 Southeast St. Croix HUC14, offshore B 24.146 STC-OFF2 SE-1, STC-OFF10 SE-3 VI-STC-59 Canegarden Bay B 0.8542 STC-15 Canegarden Bay, STC- 15A VI-STC-60 Canegarden Bay, offshore B 0.7933 There are currently no monitoring stations within this assessment unit. VI-STC-61 Hess Oil Virgin Islands Harbor C 0.671 STC-16 HOVENSA East Turning Basin, NW Corner, STC-17 HOVENSA West Turning Basin, NW Corner VI-STC-62 Limetree Bay B 0.7239 STC-18 Limetree Bay Container Port VI-STC-63 Martin-Marietta Alumina Harbor C 0.3228 STC-19 Krause Lagoon Channel, STC-20 Alumina Plant Dock VI-STC-64 Manning Bay/Estate Anguilla Beach B 0.0508 STC-23 Public Dump VI-STC-65 Hovensa, west B 1.2865 STC-21 Spoils Island (Ruth Island) VI-STC-66 Hovensa subwatershed, offshore B 2.8305 STC-22A Treatment Plant (POTW) Outfall VI-STC-67 Southports St. Croix HUC14, offshore B 8.1966 STC-OFF9 SW-3 VI-STC-68 Bethlehem subwatershed, inshore B 0.2149 There are currently no monitoring stations within this assessment unit. VI-STC-69 Bethlehem subwatershed, offshore B 0.3971 There are currently no monitoring stations within this assessment unit. VI-STC-70 Airport, nearshore B 2.1943 There are currently no monitoring stations within this assessment unit. VI-STC-71 Airport, offshore B 4.263 STC-OFF6 South-2 VI-STC-72 Airport St. Croix HUC14, offshore B 4.1803 There are currently no monitoring stations within this assessment unit. 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STC-73 Diamond, nearshore B 0.1699 There are currently no monitoring stations within this assessment unit. VI-STC-74 Enfield Green Beach/Virgin Islands Rum Industries Ltd. (VIRIL) Outfall B 0.1376 There are currently no monitoring stations within this assessment unit. VI-STC-75 Diamond subwatershed, offshore B 2.8479 STC-24B Rum Plant (VI Rum) Outfall VI-STC-76 Carlton Beach B 0.2447 There are currently no monitoring stations within this assessment unit. VI-STC-77 Long Point Bay B 0.8376 STC-25 Long Point VI-STC-78 Long Point Bay subwatershed, offshore B 4.9231 STC-OFF12 SW-4 VI-STC-79 Good Hope Beach B 0.1876 STC-26 Good Hope Beach VI-STC-80 Sandy Point, nearshore south B 2.0121 There are currently no monitoring stations within this assessment unit. VI-STC-81 Sandy Point, offshore south B 7.4306 There are currently no monitoring stations within this assessment unit. VI-STC-82 Sandy Point, nearshore west B 0.1158 STC-27 Sandy Point Public Beach, VI896490 Dorsch Bay, VI907985 Stony Ground VI-STC-83 Sandy Point, offshore west B 0.4875 There are currently no monitoring stations within this assessment unit. VI-STC-84 Southwest St. Croix HUC14, offshore B 18.347 STC-OFF3 SW-1 VI-STJ-01 Caneel Bay B 0.2623 STJ-54 Caneel Bay, NPS-1 Caneel Bay, VI658467 Caneel Beach VI-STJ-02 Hawksnest Bay B 0.2246 STJ-44B Hawksnest Bay, VI255380 Oppenheimer, NPS-3 Hawksnest (middle beach), NPS- 4 Hawksnest (Gibney Beach) 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STJ-03 Trunk Bay A 0.0685 STJ-44A Trunk Bay, NPS-5 Trunk Bay VI-STJ-04 Hawksnest Bay subwatershed, offshore B 1.7287 NPS-2 Henley Cay VI-STJ-05 Cinnamon Bay B 0.1456 STJ-44C Cinnamon Bay, NPS-6 Peter Bay, NPS-7 Cinnamon Bay VI-STJ-06 Maho Bay/Francis Bay B 0.346 STJ-44D Francis Bay, VI536165 Big Maho Bay, NPS-8 Maho Bay, NPS-9 Francis Bay VI-STJ-07 Maho Bay subwatershed,offshore B 1.6071 There are currently no monitoring stations within this assessment unit. VI-STJ-08 Mary Point B 0.4831 There are currently no monitoring stations within this assessment unit. VI-STJ-09 Leinster Bay B 0.6627 NPS-10 Leinster Bay VI-STJ-10 Minnebeck Bay B 1.4876 NPS-11 Haulover Bay, NPS-30 Newfoundland Bay, NPS-31 Haulover East VI-STJ-11 Newfound Bay B 0.0765 There are currently no monitoring stations within this assessment unit. VI-STJ-12 North St. John HUC14, offshore B 23.719 STJ-OFF3 VI-STJ-131 Round Bay B 0.6965 STJ-57 Round Bay VI-STJ-14 Hurricane Hole B 0.7689 NPS-13 Water Creek, NPS-14 Princess Bay VI-STJ-15 Coral Harbor B 0.6015 STJ-53 Coral Bay, STJ-56 Johnson Bay, VI823989 Johnson’s Bay, NPS-15 Coral Bay Dock, NPS-16 Johnson Bay 0.359 VI-STJ-16 Coral Bay B 2.2337 STJ-58 Privateer Bay, NPS-12 Long Point 1 Please note, in previous integrated reports, the assessment unit IDs for Round Bay (VI-STJ-13) and Coral Harbor (VI-STJ- 15) were reversed. 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STJ-17 Salt Pond Bay B 0.1978 STJ-52 Salt Pond Bay, NPS-17 Salt Pond Bay VI-STJ-18 Grootman Bay B 0.1046 There are currently no monitoring stations within this assessment unit. VI-STJ-19 Great Lameshur Bay B STJ-51 Great Lameshur Bay, STJ-50 Little Lameshur Bay, NPS-18 Great Lameshur Bay, NPS-19 Yowsi Point, NPS-20 Little Lameshur Bay VI-STJ-20 Southeast St. John HUC14, offshore B 24.319 STJ-OFF7 VI-STJ-21 Genti Bay, nearshore B 0.0947 STJ-49 Genti Bay, NPS-21 Reef Bay VI-STJ-22 Genti Bay, offshore B 0.769 There are currently no monitoring stations within this assessment unit. VI-STJ-23 Fish Bay B 0.2103 STJ-48 Fish Bay, NPS-22 Fish Bay VI-STJ-24 Fish Bay subwatershed, offshore B 0.1824 There are currently no monitoring stations within this assessment unit. VI-STJ-25 Rendezvous Bay B 0.4677 STJ-47 Rendezvous Bay, NPS-23 Rendezvous Bay, VI204627 Klain Bay, VI402599 Hart Bay VI-STJ-26 Chocolate Hole B 0.1004 STJ-46 Chocolate Hole, NPS-24 Chocolate Hole, VI391298 Chocolate Hole VI-STJ-27 Rendezvous Bay subwatershed, offshore B 0.1863 There are currently no monitoring stations within this assessment unit. VI-STJ-28 Great Cruz Bay B 0.1396 STJ-45 Great Cruz Bay. NPS-25 Great Cruz Bay, VI779192 Great Cruz Bay VI-STJ-29 Turner Bay/Enighed Pond B 0.057 STJ-55 Turner Bay, NPS-26 Turner Bay 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STJ-30 Cruz Bay B 0.0674 STJ-43A Cruz Bay, North, STJ- 43B Cruz Bay, South, STJ-43C Cruz Bay, North of Seaplane Ramp, STJ-43D Cruz Bay Creek North, NPS- 27 Cruz Bay (ferry dock), NPS-28 Cruz Bay (airplane ramp), NPS-29 Cruz Bay (NPS dock), VI309453 Cruz Bay VI-STJ-31 Great Cruz Bay watershed, offshore B 0.5775 VI456779 Frank Bay VI-STJ-32 Southwest St. John HUC14, offshore B 10.142 STJ-OFF 4 VI-STJ-33 Pillsbury Sound B 6.9399 STJ-OFF13 STJ West-4 VI-STT-01 Botany Bay B 0.1576 STT-9 Botany Bay VI-STT-02 Stumpy Bay B 0.0597 STT-10 Stumpy Bay VI-STT-03 Botany Bay subwatershed, offshore B 1.309 There are currently no monitoring stations within this assessment unit. VI-STT-04 Santa Maria Bay B 0.3617 STT-11 Santa Maria Bay VI-STT-05 Caret Bay B 0.0266 STT-12 Caret Bay VI-STT-06 Neltjeberg Bay B 0.0562 STT-13B Neltjeberg Bay VI-STT-07 Dorothea B 0.0254 STT-13 Dorothea VI-STT-08 Hull Bay B 0.2049 STT-14 Hull Bay, VI616865 Hull Bay VI-STT-09 Dorothea Bay subwatershed, offshore B 0.7673 There are currently no monitoring stations within this assessment unit. VI-STT-10 Magens Bay B 1.6208 STT-15, STT-15A, STT-15B Magens Bay, VI672756 Magen’s Bay VI-STT-11 Northwest St. Thomas HUC14, offshore B 55.088 STT-OFF1 STT NW-1, STT- OFF9 STT NW-3 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STT-12 Lovenlund Bay B 0.0228 There are currently no monitoring stations within this assessment unit. VI-STT-13 Mandahl Bay (Marina) B 0.0131 STT-16B Mandahl Bay Entrance, STT-16C Mandahl Point Entrance VI-STT-14 Tutu Bay B 0.0414 There are currently no monitoring stations within this assessment unit. VI-STT-15 Sunsi Bay B 0.0152 STT-17B Sunsi Bay VI-STT-16 Spring Bay B 0.0102 STT-17A Spring Bay VI-STT-17 Mandahl Bay subwatershed, offshore B 1.1379 STT-16A Mandahl Bay, STT-18 Coki Point Bay, VI577932 Coki Point VI-STT-18 Water Bay B 0.0845 STT-19 Water Bay, VI591668 Water Bay VI-STT-19 Smith Bay B 0.1187 STT-20 Smith Bay, VI431925 Lindquist Beach VI-STT-20 Smith Bay subwatershed, offshore B 0.4103 There are currently no monitoring stations within this assessment unit. VI-STT-21 St. John Bay B 0.0411 STT-21A St. John Bay, VI327776 Sapphire Beach VI-STT-22 Red Bay B 0.0078 STT-21B Red Bay VI-STT-23 Vessup Bay B 0.0619 STT-22B Vessup Bay, USGS- 50263000 Vessup Bay West VI-STT-24 Red Hook Bay B 0.1772 STT-22A Red Hook Bay, VI764950 Vessup Bay, USGS- 50263500 Vessup Bay East VI-STT-25 Great Bay B 0.5593 STT-23 Great Bay, VI505006 Bluebeards Beach VI-STT-26 Red Hook Bay, offshore B 0.4725 There are currently no monitoring stations within this assessment unit. VI-STT-27 St. James Islands, offshore B 0.6691 There are currently no monitoring stations within this assessment unit. 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STT-28 Cowpet Bay B 0.0757 STT-24 Cowpet Bay, STT-24A Cowpet Bay West VI-STT-29 St. James Bay B 1.2439 There are currently no monitoring stations within this assessment unit. VI-STT- 30A Northeast St. Thomas HUC14, offshore north B 42.927 STT-OFF6 STT North-2, STT- OFF12 STT NE-4 VI-STT- 30B Northeast St. Thomas HUC14, offshore south B 24.908 There are currently no monitoring stations within this assessment unit. VI-STT-31 Nazareth Bay B 0.1793 STT-25 Nazareth Bay, STT-25B Secret Harbor, STT-26, STT-26A Benner Bay, VI389422 Secret Harbor VI-STT-32 Jersey Bay, offshore B 1.2925 There are currently no monitoring stations within this assessment unit. VI-STT-33 Benner Bay B 0.4187 USGS-50265900 Benner Bay South VI-STT-34 Benner Bay Lagoon Marina B 0.0355 STT-27D Mangrove Lagoon, Near Lavida Marina, STT-27E Mangrove Lagoon, Near Compass Point, USGS-50265700 Benner Bay North VI-STT-35 Mangrove Lagoon B 0.2931 STT-27A Mangrove Lagoon, Near Treatment Plant, STT-27B Mangrove Lagoon, Off Sanitary Landfill (East of Ecotours), STT- 27C Mangrove Lagoon, Near Tropical Marine Fuel Dock, USGS-50278800 Mangrove Lagoon West, USGS-50278500 Mangrove Lagoon East VI-STT-36 Frenchman Bay subwatershed, east B 0.3532 STT-28A Bovoni Bay, STT-28B Bolongo Bay, VI951607 Bolongo Bay VI-STT-37 Frenchman Bay B 0.0195 VI891065 Frenchman’s Bay VI-STT-38 Limetree Bay B 0.0065 STT-29B Limetree Bay, VI776527 Limetree Bay 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STT-39 Morningstar Bay B 0.0215 STT-29A Frenchman Bay, VI937158 Morningstar Bay VI-STT-40 Pacquereau Bay B 0.0453 STT-31A Flamboyant Cove VI-STT-41 Frenchman Bay subwatershed, offshore B 2.9233 STT-30 Morningstar Bay VI-STT-42 Southeast St. Thomas HUC14, offshore B 50.939 STT-OFF8 STT South-3, STT- OFF5 STT North2 VI-STT-43 St. Thomas Harbor, inner C 0.7495 STT-31B Hassel Island, Off Navy Dock, STT- 31C Hassel Island, Careening Cove, STT- 32A Long Bay, Near South Dolphin, STT-32B Long Bay, Northeast Corner, STT-33A Long Bay, Off Outfall, STT-33B Long Bay, Off Outfall, STT-34 Long Bay, Off Pump Station, STT-35 Groden Bay, STT-36 St. Thomas Harbor, North of Coast Guard Dock, STT-37 St. Thomas Harbor, Cay Bay, STT-38 Haulover Cut VI-STT-44 St. Thomas Harbor, outer B 1.2128 There are currently no monitoring stations within this assessment unit. VI-STT-45 Gregerie Channel B 1.7072 STT-1 Crown Bay, Near Outfall, STT-39 Water Isle, East Gregorie Channel VI-STT-46 Sprat Bay B 0.3814 STT-42 Water Island Sprat Bay VI-STT-47 Hassel Island at Haulover Cut to Regis Point C 0.2074 STT-2 Crown Bay, Near Tamarind Outlet, STT-3 Subbase VI-STT-48 Water Isle Hotel, Beach B 0.0057 There are currently no monitoring stations within this assessment unit. VI-STT-49 Druif Bay B 0.0331 STT-40 Water Isle Hotel, Beach VI-STT-50 Flamingo B 0.061 STT-41 Water Island Flamingo Bay VI-STT-51 Krum Bay C 0.0754 STT-4 Krum Bay 2020 USVI Integrated Report AU ID AU Name Class AU Size (mi2) Associated Monitoring Stations VI-STT-52 Lindbergh Bay B 0.2612 STT-5A Lindbergh Bay East, STT-5B Lindbergh Bay West, STT-5C WAPA Outfall, VI514102 Lindberg Bay VI-STT-53 Cyril E. King Airport subwatershed, offshore B 0.8499 STT-6C S.W. Road, Near Red Point Outfall VI-STT-54 Perseverance Bay, offshore B 0.4734 STT-6B College Cove VI-STT-55 Brewers Bay B 0.1076 STT-7A Brewers Bay, VI293962 Brewer’s Bay VI-STT-56 Perseverance Bay B 0.2114 STT-7B Perseverance Bay VI-STT-57 Fortuna Bay B 0.0827 STT-8 Fortuna Bay VI-STT-58 Fortuna Bay subwatershed, offshore B 0.6553 There are currently no monitoring stations within this assessment unit. VI-STT-59 Northwest St. Thomas HUC14, offshore B 77.71 STT-6A Airport Runway, STT- OFF2 STT NW-1, STT-OFF11 STT SW-4 Unmonitored Waters: It is the goal to assess and characterize the condition of all waters in the U.S. Virgin Islands. The waters listed in Table 6 have not been assessed for the 2020 cycle since there are no monitoring stations located within these assessment units. Table 6: Unmonitored Waters Assessment Name Class VI-STC-01 Frederiksted, south B VI-STC-03 Lagrange subwatershed, offshore B VI-STC-04 Prosperity, nearshore B VI-STC-05 Prosperity subwatershed, offshore B VI-STC-07 Creque Dam/Butler Bay B VI-STC-08 Hams Bay B VI-STC-09 Davis Bay B VI-STC-10 Hams Bluff B VI-STC-11 Northwest St. Croix HUC14, offshore B VI-STC-14 Belvedere B VI-STC-15 Northside subwatershed B VI-STC-17 Salt River Lagoon, Sugar Bay B VI-STC-19 Judith Fancy B VI-STC-20 Salt River Bay subwatershed, west B 2020 USVI Integrated Report Assessment Name Class VI-STC-21 Salt River Bay subwatershed, east B VI-STC-22 Northcentral St. Croix HUC14, offshore B VI-STC-28 Altona Lagoon B VI-STC-32 Altona Lagoon subwatershed, offshore B VI-STC-33 Punnett Bay B VI-STC-37 Southgate subwatershed, offshore B VI-STC-38 Solitude Backreef B VI-STC-42 Buck Island Forereef A VI-STC-43 Solitude and Teague Bay subwatersheds, offshore B VI-STC-44 Northeast St. Croix HUC14, offshore. B VI-STC-45 Isaac Bay B VI-STC-48 Turner Hole subwatershed, offshore B VI-STC-50 Madam Carty, offshore B VI-STC-51 Great Pond B VI-STC-53 Great Pond Bay subwatershed, offshore B VI-STC-54 Leprey Valley Backreef B VI-STC-55 Leprey Valley subwatershed, offshore B VI-STC-57 Bugby Hole subwatershed, offshore B VI-STC-58 Southeast St. Croix HUC14, offshore B VI-STC-60 Canegarden Bay, offshore B VI-STC-67 Southports St. Croix HUC14, offshore B VI-STC-68 Bethlehem subwatershed, inshore B VI-STC-69 Bethlehem subwatershed, offshore B VI-STC-70 Airport, nearshore B VI-STC-71 Airport, offshore B VI-STC-72 Airport St. Croix HUC14, offshore B VI-STC-73 Diamond, nearshore B VI-STC-74 Enfield Green Beach/VIRIL Outfall B VI-STC-76 Carlton Beach B VI-STC-78 Long Point Bay subwatershed, offshore B VI-STC-80 Sandy Point, nearshore south B VI-STC-81 Sandy Point, offshore south B VI-STC-83 Sandy Point, offshore west B VI-STC-84 Southwest St. Croix HUC14, offshore B VI-STJ-01 Caneel Bay B VI-STJ-04 Hawksnest Bay subwatershed, offshore B VI-STJ-07 Maho Bay subwatershed, offshore B VI-STJ-08 Mary Point B VI-STJ-09 Leinster Bay B VI-STJ-10 Minnebeck Bay B VI-STJ-11 Newfound Bay B VI-STJ-12 North St. John HUC14, offshore B VI-STJ-14 Hurricane Hole B VI-STJ-18 Grootman Bay B 2020 USVI Integrated Report Assessment Name Class VI-STJ-20 Southeast St. John HUC14, offshore B VI-STJ-22 Genti Bay, offshore B VI-STJ-24 Fish Bay subwatershed, offshore B VI-STJ-27 Rendezvous Bay subwatershed, offshore B VI-STJ-31 Great Cruz Bay watershed, offshore B VI-STJ-32 Southwest St. John HUC14, offshore B VI-STJ-33 Pillsbury Sound B VI-STT-03 Botany Bay subwatershed, offshore B VI-STT-06 Neltjeberg Bay B VI-STT-09 Dorothea Bay subwatershed, offshore B VI-STT-11 Northwest St. Thomas HUC14, offshore B VI-STT-12 Lovenlund Bay B VI-STT-14 Tutu Bay B VI-STT-20 Smith Bay subwatershed, offshore B VI-STT-26 Red Hook Bay, offshore B VI-STT-27 St. James Islands, offshore B VI-STT-29 St. James Bay B VI-STT-30A Northeast St. Thomas HUC14, offshore north B VI-STT-30B Northeast St. Thomas HUC14, offshore south B VI-STT-32 Jersey Bay, offshore B VI-STT-33 Benner Bay B VI-STT-44 St. Thomas Harbor, outer B VI-STT-48 Water Isle Hotel, Beach B VI-STT-58 Fortuna Bay subwatershed, offshore B VI-STT-59 Northwest St. Thomas HUC14, offshore B The monitored waters in Table 7 have not been assessed in the 2020 cycle for one or more parameters due to fewer than the minimum number of samples being taken from their respective monitoring stations. Table 7: Waters with Fewer than Eight Samples Assessment Name Class VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) B VI-STC-36 Green Cay Beach B VI-STJ-02 Hawksnest Bay B VI-STJ-03 Trunk Bay A VI-STJ-05 Cinnamon Bay B VI-STJ-06 Maho Bay/Francis Bay B VI-STJ-17 Salt Pond Bay B VI-STJ-21 Genti Bay, nearshore B VI-STT-13 Mandahl Bay (Marina) B VI-STT-22 Red Bay B VI-STT-37 Frenchman Bay B VI-STT-51 Krum Bay B 2020 USVI Integrated Report Inventory of Physical, Chemical and Microbiological Data: The inventory of physical, chemical and microbiological data used to develop the 2020 integrated report and make water quality assessments consists of a search of monitoring results from samples taken between October 1, 2017 and September 30, 2019 downloaded from the water quality portal located at https://www.waterqualitydata.us/portal/ on October 24, 2019. The portal includes data from the ambient and beach water quality monitoring programs. The parameters used to perform the assessments are clarity, dissolved oxygen, enterococcus, pH, total phosphorus, temperature and turbidity. The U.S. Virgin Islands Division of Environmental Protection’s Coastal Water Quality (ambient) Monitoring Program is managed by the Water Quality Management Program. Through the Coastal Water Quality Monitoring Program, ambient water quality is monitored on a quarterly basis. Through an in-kind assistance agreement, a U.S. EPA contractor was responsible for conducting quarterly ambient monitoring. The water quality management program also monitors designated recreational beaches on a weekly basis through the beach water quality monitoring program. The beach water quality monitoring program collects samples at up to 43 designated beaches throughout the territory and analyzes the samples for enterococcus. The data is uploaded to the EPA’s Storage and Retrieval Database, known as STORET, through the water quality exchange. DPNR Monitoring Sites in Areas that contain coral reef ecosystems: Any water quality data obtained from coral reef ecosystem areas is assessed with more restrictive conventional numeric criteria as reflected in U.S. Virgin Islands’ 2015 Water Quality Standards. Areas that contain coral reef ecosystems are determined based on benthic habitat mapping of Puerto Rico and the U.S. Virgin Islands (NCCOS, 2002). For the purposes of this assessment, a coral reef ecosystem is categorized as coral habitats classified by NOAA as linear reef, patch reef or spur and groove formations (Kendall et al., 2001). The coral habitats are described as: • Linear Reef: Linear coral formations that are oriented parallel to shore or the shelf edge. These features follow the contours of the shore/shelf edge. This category is used for such commonly used terms as fore reef, fringing reef and shelf edge reef. • Patch Reef(s): Coral formations that are isolated from other coral reef formations by sand, seagrass or other habitats and that have no organized structural axis relative to the contours of the shore or shelf edge. A surrounding halo of sand is often a distinguishing feature of this habitat type when it occurs adjacent to submerged vegetation. • Spur and Groove: Habitat having alternating sand and coral formations that are oriented perpendicular to the shore or bank/shelf escarpment. The coral formations (spurs) of this feature typically have a high vertical relief compared to pavement with sand channels and are separated from each other by 1-5 meters of sand or bare hardbottom (grooves), although the height and width of these elements may vary considerably. This habitat type typically occurs in the fore reef or bank/shelf escarpment zone. When compared against global positioning system locations of the above monitoring locations, only two monitoring stations are currently located in coral reef ecosystems: 2020 USVI Integrated Report • Monitoring point STT-14 (linear reef) which is in assessment unit VI-STT-08 and • Monitoring point STJ-57 (also linear reef) which is in assessment unit VI-STJ-13. Note that the U.S. Virgin Islands uses a similar system to name its monitoring locations and assessment units. The assessment units are distinguished by the addition of “VI” before the name. For instance, STT-14 is a monitoring point while VI-STT-14 is an assessment unit. Previous assessments have included points STT-12, STC-7 and STT-22A as coral habitat areas. For point STT-12, the latitude and longitude are in an area classified as scattered coral and point STC-7 is in an area classified as colonized pavement. For this assessment, points STT-12, STC-7 and STT-22A are not located in coral reef ecosystems. For point STC-22A, there is a discrepancy. The U.S. Virgin Islands lists the latitude and longitude for the point as 17.67865, -64.7728 (which does intersect with patch reef). See Figure 3, point labeled USVIST-STC-22A. The label for the point is above and to the right of the orange point that represents the latitude and longitude. In Figure 3, patch reef is represented by purple. The latitude and longitude for point STC-22A from the water quality portal, labeled as EPAR2_USVIBADPNRP_water quality standards-STC-22A, is 17.67218, -64.77294. Point EPAR2_USVIBADPNRP_water quality standards-STC-22A does not intersect with a reef. It is possible that the point was moved so as not to disturb the coral when using the monitoring equipment in the field. Application of Natural Conditions (turbidity exemption): Table 8 lists the Class B waters, based on §186-11, that are not covered by the Class B turbidity and color criteria. Table 8: Application of Turbidity Exemption Location Associated Sampling Point(s) Assessment Unit(s) Benner Bay STT-27D, STT-27E VI-STT-33, VI-STT-34 Buccaneer Beach STC-3, VI651587 VI-STC-31 Carlton Beach none VI-STC-76 Enfield Green Beach none VI-STC-74 Estate Anguilla Beach STC-23 VI-STC-64 Good Hope Beach STC-26 VI-STC-79 Green Cay Beach STC-4 VI-STC-35 Mandahl Bay (Marina) STT-16B VI-STT-13 Mangrove Lagoon STT-27A, STT-27B, STT-27C VI-STT-35 Salt River Lagoon (Marina) STC-33 VI-STC-16 Figure 3: Location of Monitoring Station STC-22A 2020 USVI Integrated Report Location Associated Sampling Point(s) Assessment Unit(s) Salt River Lagoon (Sugar Bay) STC-33B VI-STC-18 Tamarind Reef Lagoon STC-5 VI-STC-37 Vessup Bay STT-22B VI-STT-23 Water Bay STT-19, VI591668 VI-STT-18 Evaluation of External Data: The DPNR published a data solicitation notice in The Virgin Island Daily News on September 20, 2019. The DPNR considers data received during its data solicitation period for the submission of the draft 303(d) list. All data received is reviewed for credibility and if determined to be of high quality and of great significance it may be added as an appendix. Other data sources refer to any data that was collected outside of the U.S. Virgin Islands DPNR. When data from other sources is received, the quality assurance project plan, often referred to as a QAPP, is used to evaluate the data to determine if the DPNR’s data quality objectives are met. If the data is determined to be acceptable then the data is used in the reporting cycle’s assessments. A rationale for any decision to not use any existing and readily available data and information is included in the integrated report. The Water Quality Portal is a cooperative service sponsored by the U.S. Geological Survey, the U.S. Environmental Protection Agency and the National Water Quality Monitoring Council that integrates publicly available water quality data from the USGS National Water Information System, the EPA STORET Data Warehouse, and the USDA Sustaining the Earth’s Watersheds - Agricultural Research Database System. The data can be accessed at: https://www.waterqualitydata.us/portal/. For this cycle, the water quality portal did not include any additional data beyond the data produced by the EPA and the DPNR. 5. Assessment Methodology The U.S. Virgin Islands water quality standards set limits for various criteria. All readily available data that meet quality assurance/quality control requirements is compared to the limits set by the U.S. Virgin Islands water quality standards to determine which waterbodies exceed these limits. A summary of the water quality and assessment criteria for each parameter is provided in Table 9. Table 9: Water Quality and Assessment Criteria Parameter Source Data Type Assessment Method Enterococcus Ambient The 30-day geometric mean for enterococcus shall not exceed 30 colony-forming units/100 mL and no more than 10 percent of the samples collected in the same 30 days shall exceed 110 colony-forming units/100 mL. Beach Turbidity Ambient A maximum nephelometric turbidity unit reading of three (3) shall be permissible, and secchi disk reading of minimum of 1 2020 USVI Integrated Report Parameter Source Data Type Assessment Method Beach meter. Clarity Ambient *For areas where coral reef ecosystems are located, a maximum nephelometric turbidity unit reading of one (1) shall be permissible, and secchi disk reading of minimum of 1 meter. Beach Total Phosphorus Ambient Shall not exceed 50 µg/l pH Ambient Class A, B: Range shall not be outside 7.0 to 8.3 standard units Class C: Range shall not be outside 6.7 to 8.5 standard units Dissolved Oxygen Ambient Class A, B: Shall be no less than 5.5 mg/L Class C: Shall be no less than 5.0 mg/L Temperature Ambient Shall not exceed 32 degrees Celsius at any time, nor as a result of waste discharge to be greater than 1.0°C above natural conditions *For areas where coral reef ecosystems are located, shall not exceed 25-29°C at any time, nor as a result of waste discharge to be greater than 1.0°C above natural. *Areas that contain coral reef ecosystems are determined based on Benthic Habitat Mapping in Puerto Rico and the U.S. Virgin Islands (NCCOS, 2002) Data Gaps and Error Control Data gaps are not limited to existing data sets, but it can also refer to the lack of certain types of data. The U.S. Virgin Islands will make every effort to control errors that may have been reported in the data. Data determined to be erroneous or flawed based on the program’s data quality objectives established in the coastal water quality monitoring (ambient) and beach water quality monitoring programs quality assurance project plans is discarded. Table 10 lists potential data gaps that the DPNR intends to work on in the future. The DPNR plans on developing a data document in collaboration with EPA Region 2 to resolve identified data issues. Any data gaps that are identified will be included in the multi-year monitoring strategy for resolution. Table 10: Potential Data Gaps Future Assessment Methodologies to be Included Toxicity and toxicant data Wetland assessment data Intermittent streams data “Natural” levels relative to the dissolved oxygen and temperature standards Narrative criteria, as listed in Section 186-1(c) of the Virgin Islands water quality standards Radioactivity data 2020 USVI Integrated Report Natural Disasters: Hurricane season in the U.S. Virgin Islands lasts from June through November each year. During natural disasters, sampling activities are suspended. The following storm events occurred in the 2017 to 2019 assessment cycle: • On August 28, 2019, Hurricane Dorian intensified into a Category 1 hurricane as it approached St. Thomas in the U.S. Virgin Islands. At 18:00 UTC that day, Hurricane Dorian made landfall on St Thomas Island with hurricane-force winds recorded at Category 1 intensity. • On September 24th, 2019, Tropical Storm Karen passed just west of St. Croix. Tropical Storm Karen hit St. John and St. Thomas with 45mph winds while moving north. U.S. Virgin Islands Gov. Albert Bryan Jr. said the storm caused mudslides in the territory in Bordeaux and on St. John around Centerline Road. Quality Assurance/Quality Control: The DPNR evaluates all internal monitoring data to determine if the Data Quality Objectives outlined in the U.S. Virgin Islands Ambient Water Quality Monitoring Program Quality Assurance Project Plan are met (i.e. compliance with the relative percent difference of 30 or less). Once the data is determined to meet the required objectives, the data is used to conduct the assessments for the reporting cycle. The elements evaluated are as follows: Precision and accuracy: The precision and accuracy of data is determined by actions of the analytical laboratory and field staff, which are outlined in the program’s respective standard operating procedures and quality assurance project plans. Representativeness: The representativeness of the data is mainly dependent on the sampling locations and the sampling procedures adequately representing the true condition of the sample site. Sampling station locations and the use of only approved/documented analytical methods determine that the measurement data represents the conditions at the site. Where possible and applicable, sampling schedules are designed with respect to frequency, locations and methodology in order to maximize representativeness. Laboratory representativeness is achieved by following analytical procedure and standard operating procedures, meeting holding times, and assessment and comparison of field duplicate samples. Results reported below the detection limit are calculated using the detection limit. For enterococcus, in order to calculate geometric means, a value of one is substituted for values of zero. Comparability: The comparability of data produced by and for the DPNR is predetermined by the commitment of its staff and analytical laboratories to use standardized methods, where possible, including EPA approved analytical methods, or documented modifications thereof which provide equal or better results. These methods have specified units in which the results are to be reported. Completeness: The completeness of data is a relationship of how much of the data is available for use compared to the total potential data before any conclusion is reached. Ideally, 100% of the data should be available. However, the possibility of data becoming unavailable due to laboratory error, insufficient sample volume, or samples broken in shipping must be expected. Also, unexpected situations may arise where field conditions do not allow for 100% data completeness. Failure to achieve 100% data completeness usually will result from the field crew’s inability to sample at stations because of logistical barriers, such as insufficient depth or adverse weather conditions. In the limited number of instances where these may be encountered, efforts will be made to relocate the station in an adjacent area or re- 2020 USVI Integrated Report sample the station. In addition, established protocols for tracking samples during shipment and laboratory processing must be followed to minimize data loss following successful sample collection. The DPNR has various completeness goals: 100% for data collection and data usage, which directly correlates to a 100% goal for data used to make assessments. However, if less than 16 data points over four years are collected for a specific assessment unit, then the DPNR will not be able to de-list those assessment units eligible for delisting. It is the responsibility of the program manager to verify that the data is representative and complete. The laboratory supervisor is responsible for ensuring the data’s precision, accuracy and comparability. Listing Rules: Minimum Number of Samples: Unless described differently for a specific parameter, the minimum data set consists of eight samples in an assessment unit. The DPNR believes that two years of data collected quarterly by the Coastal Water Quality Monitoring Program and the data collected during the weekly Beach Water Quality Monitoring Program are adequate and represents the minimum dataset necessary for an adequate assessment. Where there is more than one point in an assessment unit, the data is assessed together. Multiple samples from the same day are not averaged, since the majority of the water quality standards are “not to exceed” standards. These recommendations are intended to ensure that existing water quality conditions are accurately portrayed by the data and that the results do not reflect transitional conditions. The DPNR will consider a data set which does not meet this minimum requirement on a case-by-case basis to determine if the data adequately characterizes the water quality conditions. Summer-only sampling for nutrients, pathogenic quality, and temperature may be acceptable since summer generally represents the critical condition for these parameters. If the DPNR determines that the data set adequately represents water quality conditions and there are at least two exceedances of the surface water quality standards, this limited data set is used to determine that a use is not attained. Listing Removal: If a water quality standard is no longer applicable, the DPNR can delist a waterbody only for the parameter(s) affected. This stipulation is intended to include instances where a parameter is removed from the Virgin Islands water quality standards. While it is not anticipated that this circumstance is frequent or numerous, this provision is considered necessary to ensure that no parameter will stay on the 303(d) list of impaired waterbodies in perpetuity, without the opportunity for de-listing. Any such changes that result in a de-listing due to this stipulation will meet Antidegradation Implementation Procedures detailed in the Virgin Islands water quality standards. Designated Use Attainment The U.S. Virgin Islands water quality standards identify specific designated uses for the waters of the territory according to its waterbody classifications. Designated uses include: • maintenance and propagation of desirable species of aquatic life (including threatened, endangered species listed pursuant to section 4 of the federal Endangered Species Act and threatened, endangered and indigenous species listed pursuant Title 12, Chapter 2 of the Virgin Islands Code) • primary contact recreation (swimming, water skiing, etc.). 2020 USVI Integrated Report The DPNR uses both numeric and narrative criteria to protect designated uses. Numeric criteria are estimates of constituent concentrations that are protective of the designated uses. Narrative criteria are non-numeric descriptions of conditions to be attained/maintained or avoided. Waterbody delineations, or assessment units, used for determining use support are derived from geographic information system coverages. Use attainability for each assessment unit is determined using the most current version of the U.S. Virgin Islands water quality standards. The current standards were promulgated on August 28, 2015. As part of the assessment process, each assessment is rated as being supporting, not supporting or insufficient information (usually the result of a data gap). Assessment units that are placed into category 5 must have a total maximum daily load, known as TMDL, established and the assessment unit is placed on the 2020 303(d) List. See section 4.4 for a full description of all categories. Those assessment units determined to have insufficient information are placed into Category 3, under one of the four subcategories detailed in Section 4.4 below. The assessment unit is placed in his category if insufficient or no data is available to determine if water quality standards are attained and any designated use is supported. The Virgin Islands considers insufficient data as anything less than eight points of monitoring data. Waters with less than eight points of monitoring data may be reviewed on a case-by-case basis if the limited data strongly suggests that water quality standards are exceeded, and the designated uses are impaired. Such waters may be eligible for inclusion on the 303(d) list. In order to assess an assessment unit, data must be available for at least one applicable parameter associated with the attainment of the given designated use. Impairment of any single indicator will result in the waterbody being listed as impaired (for that parameter), even if the other indicators do not exceed the standards. The coastal waters of the U.S. Virgin Islands are evaluated for the following uses: primary contact recreation and aquatic life use. All existing and readily available data and information from the water quality portal is assembled and used in the assessment. Currently the fresh waters of the U.S. Virgin Islands are not monitored, so no assessment is done at this time for these water classes. Table 11 lists the designated use associated with each parameter that is assessed. Table 11: Parameters Considered When Assessing Designated Use Designated Use Minimum Parameters Used for Assessments Source Data Type Primary Contact Recreation Enterococcus Ambient, Beach Maintenance and propagation of desirable species of aquatic life Clarity/Transparency Ambient Dissolved Oxygen Ambient pH Ambient Phosphorus Ambient Temperature Ambient Turbidity Ambient 2020 USVI Integrated Report Conventional Parameters Assessment Conventional parameters are evaluated using the number of exceedances of water quality standards. A waterbody is determined to be impaired if there is an exceedance of a specific parameter two (2) or more times within the chosen dataset. The conventional parameters are: • Dissolved Oxygen (not less than 5.5 mg/l from other than natural conditions in Class A & B, not less than 5.0 mg/l from other than natural conditions in Class C) *; • Temperature (not to exceed 32°C at any time, nor as a result of waste discharge to be greater than 1.0°C above natural conditions; in areas where coral reef ecosystems are located**, not to exceed 25-29°C at any time, nor as a result of waste discharge to be greater than 1.0°C above natural conditions) *; • Turbidity (All Classes: shall not exceed 3 nephelometric turbidity unit and secchi disk reading of minimum of 1 meter; In areas where coral reef ecosystems are located**: shall not exceed 1 nephelometric turbidity unit and secchi disk reading of minimum of 1 meter); and • pH (Class A, B: Range shall not be outside 7.0 to 8.3 standard units; Class C: Range shall not be outside 6.7 to 8.5 standard units) • Total Phosphorus (All Classes: shall not exceed 50 µg/L in marine and coastal waters). *The term “natural condition” for dissolved oxygen and temperature will be addressed through work in collaboration with the EPA for Class B and C waters during a future triennial review of the water quality standards. During that process, the DPNR will outline how it will define reference sites and establish reference conditions. Once developed, the criteria will be incorporated into this assessment methodology. **Areas that contain coral reef ecosystems are determined based on Benthic Habitat Mapping in Puerto Rico and the U.S. Virgin Islands (NCCOS, 2002). Fecal indicator bacteria can be enumerated using various analytical methods including those in which the organisms are grown (cultured) and those in which their deoxyribonucleic acid is extracted from an environmental sample, amplified, and quantified using quantitative polymerase chain reaction (U.S. EPA, Office of Water, 2012). These different enumeration methods result in method-specific units and values. One culture-based method, membrane filtration, results in the number of colonies that arise from bacteria captured on the membrane filter per volume of water filtered. One colony can be produced from one or several cells (clumped cells in the environmental sample). Another culture-based method, the defined substrate method, produces a most probable number per volume. Most probable number analyses estimate the number of organisms in a sample using statistical probability tables, hence the term “most probable number.” Bacterial densities most probable number are based on the combination of positive and negative test tube results that can be read from a most probable number table (U.S. EPA, 2020 USVI Integrated Report 1978). Culture-based approaches for the enumeration of fecal indicator bacteria, such as most probable number and membrane filtration, generate results following the culturing of a particular microbe for 18– 24 hours, and in the case of most probable number do not result in a direct count or concentration density of the bacteria being enumerated but rather rely on probabilities. For making water quality attainment determinations, a state or territory that adopts water quality standards consistent with the 2012 recreational water quality criteria would evaluate all readily available data and information to determine whether a waterbody meets the water quality standard (i.e., whether the waterbody is in attainment). Both the geometric mean and the statistical threshold value would be part of the water quality standard and therefore both targets would be used to determine whether a waterbody meets the water quality standard for primary contact recreation. The waterbody condition would need to be evaluated based on all existing and readily available data and information for the specified duration. The EPA’s regulation defines “all existing and readily available water quality related data and information” at 40 CFR 130.7(b)(5). The EPA expects that water quality attainment determinations would include water quality monitoring data collected as part of a beach notification program, as well as information regarding beach closures and advisories. The conditions for use support for the conventional parameters are as follows: 1. Fully Supporting: For any one pollutant or stressor, criteria exceeded in none of the measurements. 2. Not Supporting: For any one pollutant, criteria exceeded in any of the measurements two or more times within the chosen dataset. Toxicant Assessment (Aquatic Life) (Human Heath)/Toxicity Assessment The applicable numeric water quality standards for toxic pollutants to protect the designated uses of waters of the U.S. Virgin Islands shall be the EPA’s national recommended Clean Water Act section 304(a) water quality criteria. Those parameters can be found at www.epa.gov/wqc. The conditions for use support are as follows: 1. Fully Supporting: No toxicants or toxicity noted in either acute or chronic tests compared to controls or reference conditions. 2. Partially Supporting: No toxicants or toxicity noted in acute tests but may be present in chronic tests in either slight amounts and/or infrequently within an annual cycle. 3. Not Supporting: Toxicants or toxicity noted in many tests and occurs frequently. Currently, the DPNR does not collect any toxicity data, and none was received during the data solicitation period. Therefore, no assessments were made based on toxicants or toxicity during this reporting period. The DPNR will continue to review its criteria for these assessments and will work to improve upon the current criteria to ensure they are relevant to the assessment of human health. Additionally, as the DPNR works to expand the Virgin Islands water quality standards this section will continue to be amended. 2020 USVI Integrated Report Habitat Assessment Determination of aquatic life use support will consider habitat assessment data (based on availability) in relation to propagation of desired species of marine life and the biological integrity of the benthic communities living within waters. These communities shall be assessed by comparison to reference conditions(s) with similar abiotic and biotic environmental settings that represent the optimal or least disturbed condition for that system. Such reference conditions shall be those observed to support the greatest community diversity, and abundance of aquatic life as is expected to be or has been historically found in natural settings essentially undisturbed or minimally disturbed by human impacts, development, or discharges. Habitat assessment data is considered as follows: 1. Fully Supporting: Reliable data indicate natural channel morphology, substrate composition, bank/riparian structure, and flow regime of region. Riparian vegetation of natural types and of relatively full standing crop biomass (i.e., minimal grazing or disruptive pressure). 2. Partially Supporting: Modification of habitat slight to moderate usually due to road crossings, limited riparian zones because of encroaching land use patterns, and some watershed erosion. Channel modification slight to moderate. 3. Not Supporting: Moderate to severe habitat alteration by channelization and dredging activities, removal of riparian vegetation, bank failure, heavy watershed erosion or alteration of flow regime and inclusion of exotic or aquatic nuisance species The DPNR received no habitat assessment data for the 2018-2019 reporting cycle. As the DPNR continues its ongoing efforts to improve the U.S. Virgin Islands water quality standards, criteria will be set for reference conditions/sites which will assist in completing habitat assessments for various waterbody classes. Biological Assessment When available, the DPNR may use data collected/received from biological monitoring projects. Upon identifying a source of data to apply towards a biological assessment, the conditions for use support, which will be evaluated in accordance with the narrative biocriteria outlined in the Virgin Islands water quality standards, as follows: 1. Fully Supporting: Reliable data indicate functioning, sustainable biological assemblages (e.g., fish, macroinvertebrates, or algae) none of which has been modified significantly beyond the natural range of the reference condition. 2. Partially Supporting: At least one assemblage (e.g., fish, macroinvertebrates, or algae) indicates moderate modification of the biological community compared to the reference condition. 3. Not Supporting: At least one assemblage indicates nonsupport. Data clearly indicates severe modification of the biological community compared to the reference condition. 2020 USVI Integrated Report The DPNR received no biological data for the 2017-2019 reporting cycle. Primary Contact Recreation Microbiological Assessment: The use support is based on a review of quarterly ambient and weekly beach data for both the statistical threshold value as well as the geometric mean of enterococcus bacteria, beach closing data and reported oil spills. Allowable limits are the same for all classes of waters: a geometric mean of 30 colony-forming unit per 100 mL, or a statistical threshold value exceedance of 110 colony-forming unit/100 mL in more than 10 percent of the samples collected in the same 30 days. The percent of total violations is evaluated as follows: 1. Fully Supporting: None of the samples exceed a geometric mean of 30 colony-forming unit/100 ml in all class waters and no exceedance of 110 colony-forming unit/100 mL in more than 10 percent of the samples collected in the same 30 days. 2. Not supporting: Any of the samples exceed a geometric mean of 30 colony-forming unit/100 ml in any class waters and exceedance of 110 colony-forming unit/100 mL in more than 10 percent of the samples collected in the same 30 days. Beach Closing Assessment: In addition to pathogens, beach-closing data will be used to determine primary contact recreation use support. The matrix of allowable violations is as follows: 1. Supporting: No bathing area closures or restrictions in effect during reporting period. 2. Not Supporting: On average, one bathing area closure per year of greater than 1 week’s duration, or more than one bathing area closure per year. * Closure as stated above refers to the Virgin Islands Department of Health or Virgin Islands Waste Management Authority closing beaches due to immediate health risks or threats. While restrictions refer to advisories which may recommend that the public avoid certain areas/beaches. The Department of Planning and Natural Resources only issues administrative advisories and cannot restrict beach access. Beach closures would only be enforced by government enforcement officials for very serious threats to human health; these closures can only be implemented by the Virgin Islands Department of Health or the Virgin Islands Waste Management Authority. These serious threats are usually related to bypasses or overflows of the municipal sewer system, which may result in raw sewage flowing onto beaches and into the nearshore/bathing areas. The DPNR has implemented a Beaches Environmental Assessment and Coastal Health (BEACH) Monitoring Program that takes samples for Enterococcus at select sites on a weekly basis. This data will be used in conjunction with data collected from the Ambient Monitoring Program. Beaches which are listed as not suitable for fishing or swimming in the weekly Beach Program have had samples collected which exceed the standard within that monitoring week. Those beaches that are re-sampled according to the BEACH QAPP and exceed the standard twice within that monitoring week shall be listed as well. 2020 USVI Integrated Report Other Parameters Throughout the course of collecting data for this report, data that do not fit within the auspices of the other assessment categories of primary contact recreation or aquatic life use (e.g. aesthetics, algae, odor, etc.) will be considered under other parameters. The following guidelines apply where appropriate: 1. Fully Supporting: For any one pollutant or stressor, criteria exceeded in none of the measurements. 2. Not Supporting: For any one pollutant, criteria exceeded in any of measurements. The DPNR intends to continue to work towards developing expanded criteria for making assessments within this category. There were no assessments made for this category during this reporting cycle. Listing Categories Category 1 The assessment unit is placed in this category if it meets the water quality standards for the parameters that define support for both primary contact recreation & aquatic life use. Category 2 The assessment unit is placed in this category if it attains water quality standards for the parameters that define support for either primary contact recreation or aquatic life use, but not all uses have sufficient data to determine if the designated use is supported. For instance, if there is sufficient data to determine that an assessment unit fully supports the primary contact recreation use based on enterococcus, but there is not sufficient data to determine whether or not the aquatic life use is met based on data for clarity, dissolved oxygen, pH, phosphorus, temperature and turbidity, the assessment unit is placed in category 2. Category 3 The assessment unit is placed under the appropriate subcategory (3A, 3B, 3C, 3D) if insufficient or no data is available to determine if water quality standards are attained and any designated use is supported. Note: The Virgin Islands considers insufficient data as anything less than eight points of monitoring data. Waters with less than eight points of monitoring data may be reviewed on a case-by- case basis if the limited data strongly suggests that water quality standards are exceeded, and the designated uses are impaired. Such waters may be eligible for inclusion on the 303(d) List. This category contains four distinct subcategories: Category 3A No data is available from any of the identified data sources for the assessment unit in question. Category 3B Insufficient data is available from any of the identified data sources for the assessment unit in question. Insufficient data is defined as less than eight points of monitoring data. This category differs from Category 2 in that this condition must apply to all designated uses. 2020 USVI Integrated Report Category 3C Inconclusive Data is available from any of the identified data sources for the assessment unit in question. This might include information from studies that do not directly provide information related to water quality standards. Category 3D Unreliable or low-quality data is available from any of the identified data sources for the assessment unit in question. Unreliable or low-quality data is defined as data sets that have significant gaps, obvious anomalies, etc. Category 4 Assessment units that are found to be partially or not supporting for one or both designated uses are place in category 4 under the appropriate subcategory (4A, 4B, 4C), but does not require the development of a TMDL. This category contains three distinct subcategories: Category 4A The assessment unit is placed in this category if it was previously listed on the 303(d) list and a TMDL has been established and approved by EPA. Category 4B The assessment unit is placed into this category only if other pollution control requirements are expected to address all water-pollutant combinations and attain all water quality standards within a reasonable period. The Virgin Islands considers a reasonable period as being the time between reporting cycles. If the impairment is the result of a point source discharge, it is expected that the Territorial Pollution Discharge Elimination System program will take appropriate measures to control point source pollution. If the impairment is the result of nonpoint source pollution, the DPNR will provide evidence that a pollution control measure is in place. Category 4C The assessment unit is placed into this category if the impairment was not caused by a pollutant, but instead is caused by pollution. Assessment Units placed in Category 4C do not require the development of a TMDL. Pollution, as defined by the CWA is “the man-made or man-induced alteration of the chemical, physical, biological, and radiological integrity of water” (section 502(19)). In some cases, the pollution is caused by the presence of a pollutant and a TMDL is required. In other cases, pollution does not result from a pollutant and a TMDL is not required. These assessment units should be scheduled for monitoring to confirm that there continues to be no pollutant associated with the failure to meet the water quality standard and to support water quality management actions necessary to address the cause(s) of the impairment Category 5 The assessment unit is placed into this category if water quality standards are exceeded and a TMDL must be established. Assessment units that are placed into Category 5 are placed on the 2020 303(d) List. De-listing 2020 USVI Integrated Report Using the abovementioned data restrictions and drawing from the dataset detailed in Section 3.1.1 above, the DPNR shall determine if any Assessment Units can be de-listed for the 2017-2019 reporting cycle. 6. Assessment Results A summary of the assessment results for each of the U.S. Virgin Islands’ 177 assessment units is listed in Table 12. Assessment units that have total maximum daily loads established are included as a separate entry where there are additional impairments. Table 12: Summary of Assessment Results AU ID AU Name Class 305(b) Category Category Impairment VI-STC-01 Frederiksted, south B Insufficient Information 3 VI-STC-02 Frederiksted Harbor C Not Supporting 5 Enterococcus, pH VI-STC-03 Lagrange subwatershed, offshore B Insufficient Information 3 VI-STC-04 Prosperity, nearshore B Not Supporting 5 Enterococcus, Turbidity VI-STC-05 Prosperity subwatershed, offshore B Insufficient Information 3 VI-STC-06 Sprat Hall Beach B Not Supporting 5 pH VI-STC-07 Creque Dam/Butler Bay B Insufficient Information 3 VI-STC-08 Hams Bay B Insufficient Information 3 VI-STC-09 Davis Bay B Insufficient Information 3 VI-STC-10 Hams Bluff B Insufficient Information 3 VI-STC-11 Northwest St. Croix HUC14, offshore B Insufficient Information 3 VI-STC-12 Cane Bay B Not Supporting 5 Dissolved Oxygen, Enterococcus, pH, Phosphorus, Turbidity VI-STC-13 Baron Bluff subwatershed B Not Supporting 5 Dissolved Oxygen, pH VI-STC-14 Belvedere B Insufficient Information 3 VI-STC-15 Northside subwatershed B Insufficient Information 3 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STC-16 Salt River Lagoon, Marina B TMDL Established 4A Dissolved Oxygen VI-STC-16 Salt River Lagoon, Marina B Not Supporting 5 Enterococcus, Transparency/Clarity VI-STC-17 Salt River Lagoon, Sugar Bay B TMDL Established 4A Dissolved Oxygen VI-STC-18 Salt River Bay B TMDL Established 4A Dissolved Oxygen VI-STC-18 Salt River Bay B Not Supporting 5 Enterococcus, pH, Turbidity VI-STC-19 Judith Fancy B Insufficient Information 3 VI-STC-20 Salt River Bay subwatershed, west B Insufficient Information 3 VI-STC-21 Salt River Bay subwatershed, east B Insufficient Information 3 VI-STC-22 Northcentral St. Croix HUC14, offshore B Insufficient Information 3 VI-STC-23 St. Croix-By-the- Sea B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand) VI-STC-23 St. Croix-By-the- Sea B Not Supporting 5 Enterococcus, pH VI-STC-24 Long Reef Backreef, west C TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand) VI-STC-24 Long Reef Backreef, west C Not Supporting 5 pH VI-STC-25 Princess subwatershed, offshore B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand) VI-STC-25 Princess subwatershed, offshore B Not Supporting 5 pH 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STC-26 Christiansted Harbor C TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Phosphorus, Fecal Coliform, Enterococcus VI-STC-26 Christiansted Harbor C Not Supporting 5 pH, Turbidity VI-STC-27 Long Reef Forereef, east B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Total Suspended Solids VI-STC-27 Long Reef Forereef, east B Not Supporting 5 pH VI-STC-28 Altona Lagoon B Insufficient Information 3 VI-STC-29 Christiansted Harbor, east C Not Supporting 5 Enterococcus, pH, Turbidity VI-STC-30 Beauregard Bay B Not Supporting 5 Enterococcus, pH, Phosphorus, Turbidity VI-STC-31 Buccaneer Beach B Not Supporting 5 Enterococcus, pH VI-STC-32 Altona Lagoon subwatershed, offshore B Insufficient Information 3 VI-STC-33 Punnett Bay B Not Supporting 5 Enterococcus, Turbidity VI-STC-34 Punnett Point, east B Not Supporting 5 Dissolved oxygen, Enterococcus, pH, Turbidity VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) B Not Supporting 5 Dissolved oxygen, Enterococcus, pH, Transparency/Clarity VI-STC-36 Green Cay Beach B Not Supporting 5 Enterococcus, Turbidity 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STC-37 Southgate subwatershed, offshore B Not Supporting 5 Dissolved Oxygen, Enterococcus, Turbidity VI-STC-38 Solitude Backreef B Insufficient Information 3 VI-STC-39 Teague Bay B Not Supporting 5 pH VI-STC-40 Teague Bay Backreef B Not Supporting 5 Dissolved oxygen, pH VI-STC-41 Buck Island Backreef A Not Supporting 5 pH, Temperature VI-STC-42 Buck Island Forereef A Insufficient Information 3 VI-STC-43 Solitude and Teague Bay subwatersheds, offshore B Insufficient Information 3 VI-STC-44 Northeast St. Croix HUC14, offshore. B Insufficient Information 3 VI-STC-45 Isaac Bay B Insufficient Information 3 VI-STC-46 Grapetree Bay B Not Supporting 5 pH VI-STC-47 Turner Hole Backreef B Not Supporting 5 Dissolved oxygen, Enterococcus, pH VI-STC-48 Turner Hole subwatershed, offshore B Insufficient Information 3 VI-STC-49 Madam Carty Backreef B Not Supporting 5 Dissolved oxygen, pH VI-STC-50 Madam Carty, offshore B Insufficient Information 3 VI-STC-51 Great Pond B Insufficient Information 3 VI-STC-52 Great Pond Bay B Not Supporting 5 Dissolved oxygen, pH VI-STC-53 Great Pond Bay subwatershed, offshore B Insufficient Information 3 VI-STC-54 Leprey Valley Backreef B Insufficient Information 3 VI-STC-55 Leprey Valley subwatershed, offshore B Insufficient Information 3 VI-STC-56 Bugby Hole Backreef B Not Supporting 5 Enterococcus, pH, Turbidity 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STC-57 Bugby Hole subwatershed, offshore B Insufficient Information 3 VI-STC-58 Southeast St. Croix HUC14, offshore B Insufficient Information 3 VI-STC-59 Canegarden Bay B Not Supporting 5 Dissolved Oxygen, pH, Turbidity VI-STC-60 Canegarden Bay, offshore B Insufficient Information 3 VI-STC-61 Hess Oil Virgin Islands Harbor C Not Supporting 5 pH, Turbidity VI-STC-62 Limetree Bay B Not Supporting 5 Dissolved Oxygen, pH VI-STC-63 Martin-Marietta Alumina Harbor C Not Supporting 5 Dissolved Oxygen, pH, Turbidity VI-STC-64 Manning Bay/Estate Anguilla Beach B Not Supporting 5 Dissolved Oxygen, pH VI-STC-65 Hovensa, west B Not Supporting 5 Dissolved Oxygen, pH VI-STC-66 Hovensa subwatershed, offshore B Not Supporting 5 pH VI-STC-67 Southports St. Croix HUC14, offshore B Insufficient Information 3 VI-STC-68 Bethlehem subwatershed, inshore B Insufficient Information 3 VI-STC-69 Bethlehem subwatershed, offshore B Insufficient Information 3 VI-STC-70 Airport, nearshore B Insufficient Information 3 VI-STC-71 Airport, offshore B Insufficient Information 3 VI-STC-72 Airport St. Croix HUC14, offshore B Insufficient Information 3 VI-STC-73 Diamond, nearshore B Insufficient Information 3 VI-STC-74 Enfield Green Beach/VIRIL Outfall B Insufficient Information 3 VI-STC-75 Diamond subwatershed, offshore B Not Supporting 5 Chronic Toxicity, Dissolved Oxygen, pH, Turbidity VI-STC-76 Carlton Beach B Insufficient Information 3 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STC-77 Long Point Bay B Not Supporting 5 pH, Transparency/Clarity, Turbidity VI-STC-78 Long Point Bay subwatershed, offshore B Insufficient Information 3 VI-STC-79 Good Hope Beach B Not Supporting 5 pH, Transparency/Clarity VI-STC-80 Sandy Point, nearshore south B Insufficient Information 3 VI-STC-81 Sandy Point, offshore south B Insufficient Information 3 VI-STC-82 Sandy Point, nearshore west B Not Supporting 5 pH, Turbidity VI-STC-83 Sandy Point, offshore west B Insufficient Information 3 VI-STC-84 Southwest St. Croix HUC14, offshore B Insufficient Information 3 VI-STJ-01 Caneel Bay B Not Supporting 5 Dissolved oxygen, Turbidity VI-STJ-02 Hawksnest Bay B Not Supporting 5 Enterococcus, Turbidity VI-STJ-03 Trunk Bay A Not Supporting 5 Enterococcus VI-STJ-04 Hawksnest Bay subwatershed, offshore B Insufficient Information 3 VI-STJ-05 Cinnamon Bay B Not Supporting 5 Enterococcus VI-STJ-06 Maho Bay/Francis Bay B Insufficient Information 3 VI-STJ-07 Maho Bay subwatershed, offshore B Insufficient Information 3 VI-STJ-08 Mary Point B Insufficient Information 3 VI-STJ-09 Leinster Bay B Insufficient Information 3 VI-STJ-10 Minnebeck Bay B Insufficient Information 3 VI-STJ-11 Newfound Bay B Insufficient Information 3 VI-STJ-12 North St. John HUC14, offshore B Insufficient Information 3 VI-STJ-13 Round Bay B Not Supporting 5 Temperature 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STJ-14 Hurricane Hole B Insufficient Information 3 VI-STJ-15 Coral Harbor B Not Supporting 5 Dissolved oxygen, Enterococcus, Turbidity VI-STJ-16 Coral Bay B Not Supporting 5 Enterococcus VI-STJ-17 Salt Pond Bay B Insufficient Information 3 VI-STJ-18 Grootman Bay B Insufficient Information 3 VI-STJ-19 Great Lameshur Bay B Fully Supporting 1 VI-STJ-20 Southeast St. John HUC14, offshore B Insufficient Information 3 VI-STJ-21 Genti Bay, nearshore B Insufficient Information 3 VI-STJ-22 Genti Bay, offshore B Insufficient Information 3 VI-STJ-23 Fish Bay B Not Supporting 5 Dissolved Oxygen, pH, Phosphorus, Transparency/Clarity, Turbidity VI-STJ-24 Fish Bay subwatershed, offshore B Insufficient Information 3 VI-STJ-25 Rendezvous Bay B Fully Supporting 1 VI-STJ-26 Chocolate Hole B Fully Supporting 1 VI-STJ-27 Rendezvous Bay subwatershed, offshore B Insufficient Information 3 VI-STJ-28 Great Cruz Bay B TMDL Established 4A Oil and Grease VI-STJ-28 Great Cruz Bay B Not Supporting 5 Turbidity VI-STJ-29 Turner Bay/Enighed Pond B Partially Supporting 2 VI-STJ-30 Cruz Bay B Not Supporting 5 Enterococcus, Turbidity VI-STJ-31 Great Cruz Bay watershed, offshore B Not Supporting 5 Enterococcus, Turbidity VI-STJ-32 Southwest St. John HUC14, offshore B Not Supporting 5 Turbidity VI-STJ-33 Pillsbury Sound B Insufficient Information 3 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STT-01 Botany Bay B Not Supporting 5 Turbidity VI-STT-02 Stumpy Bay B Not Supporting 5 Turbidity VI-STT-03 Botany Bay subwatershed, offshore B Insufficient Information 3 VI-STT-04 Santa Maria Bay B Not Supporting 5 Turbidity VI-STT-05 Caret Bay B Not Supporting 5 Turbidity VI-STT-06 Neltjeberg Bay B Insufficient Information 3 VI-STT-07 Dorothea B Fully Supporting 1 VI-STT-08 Hull Bay B Not Supporting 5 Enterococcus, Turbidity VI-STT-09 Dorothea Bay subwatershed, offshore B Insufficient Information 3 VI-STT-10 Magens Bay B TMDL Established 4A Fecal Coliform VI-STT-10 Magens Bay B Not Supporting 5 Enterococcus, Turbidity VI-STT-11 Northwest St. Thomas HUC14, offshore B Insufficient Information 3 VI-STT-12 Lovenlund Bay B Insufficient Information 3 VI-STT-13 Mandahl Bay (Marina) B Not Supporting 5 Dissolved Oxygen, Phosphorus, Turbidity VI-STT-14 Tutu Bay B Insufficient Information 3 VI-STT-15 Sunsi Bay B Fully Supporting 1 VI-STT-16 Spring Bay B Insufficient Information 3 VI-STT-17 Mandahl Bay subwatershed, offshore B Not Supporting 5 Dissolved oxygen, Enterococcus, Turbidity VI-STT-18 Water Bay B Not Supporting 5 Dissolved oxygen, Enterococcus VI-STT-19 Smith Bay B Not Supporting 5 Enterococcus VI-STT-20 Smith Bay subwatershed, offshore B Insufficient Information 3 VI-STT-21 St. John Bay B Fully Supporting 1 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STT-22 Red Bay B Not Supporting 5 Dissolved Oxygen, Enterococcus, Turbidity VI-STT-23 Vessup Bay B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand) VI-STT-23 Vessup Bay B Not Supporting 5 Enterococcus, Turbidity VI-STT-24 Red Hook Bay B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand), Oil and Grease VI-STT-25 Great Bay B Not Supporting 5 Enterococcus VI-STT-26 Red Hook Bay, offshore B Insufficient Information 3 VI-STT-27 St. James Islands, offshore B Insufficient Information 3 VI-STT-28 Cowpet Bay B Not Supporting 5 Enterococcus VI-STT-29 St. James Bay B Insufficient Information 3 VI-STT- 30A Northeast St. Thomas HUC14, offshore north B Insufficient Information 3 VI-STT- 30B Northeast St. Thomas HUC14, offshore south B Insufficient Information 3 VI-STT-31 Nazareth Bay B Not Supporting 5 Enterococcus VI-STT-32 Jersey Bay, offshore B Insufficient Information 3 VI-STT-33 Benner Bay B TMDL Established 4A Dissolved Oxygen, Fecal Coliform VI-STT-34 Benner Bay Lagoon Marina B TMDL Established 4A Fecal Coliform VI-STT-34 Benner Bay Lagoon Marina B Not Supporting 5 Enterococcus, Turbidity VI-STT-35 Mangrove Lagoon B TMDL Established 4A Fecal Coliform, Dissolved Oxygen (BOD) VI-STT-35 Mangrove Lagoon B Not Supporting 5 Enterococcus, Turbidity 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STT-36 Frenchman Bay subwatershed, east B Not Supporting 5 Enterococcus, Phosphorus, Turbidity VI-STT-37 Frenchman Bay B Not Supporting 5 Enterococcus, Turbidity VI-STT-38 Limetree Bay B Not Supporting 5 Enterococcus, Turbidity VI-STT-39 Morningstar Bay B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & Fecal Coliform VI-STT-39 Morningstar Bay B Not Supporting 5 Turbidity VI-STT-40 Pacquereau Bay B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & Fecal Coliform VI-STT-41 Frenchman Bay subwatershed, offshore B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus & Fecal Coliform VI-STT-42 Southeast St. Thomas HUC14, offshore B Insufficient Information 3 VI-STT-43 St. Thomas Harbor, inner C TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus & FecalColiform 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STT-43 St. Thomas Harbor, inner C Not Supporting 5 Turbidity VI-STT-44 St. Thomas Harbor, outer B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & Fecal Coliform VI-STT-45 Gregerie Channel B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & Fecal Coliform VI-STT-46 Sprat Bay B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & Fecal Coliform VI-STT-46 Sprat Bay B Not Supporting 5 Turbidity VI-STT-47 Hassel Island at Haulover Cut to Regis Point C TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, Fecal Coliform, Oil and Grease VI-STT-48 Water Isle Hotel, Beach B Insufficient Information 3 2020 USVI Integrated Report AU ID AU Name Class 305(b) Category Category Impairment VI-STT-49 Druif Bay B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & Fecal Coliform VI-STT-50 Flamingo B TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & Fecal Coliform VI-STT-51 Krum Bay C TMDL Established 4A Dissolved Oxygen (TMDL established for Biological Oxygen Demand & Sediment Oxygen Demand), Enterococcus, & FecalColiform VI-STT-51 Krum Bay C Not Supporting 5 Turbidity VI-STT-52 Lindbergh Bay B Not Supporting 5 Enterococcus, Turbidity VI-STT-53 Cyril E. King Airport subwatershed, offshore B Fully Supporting 1 VI-STT-54 Perseverance Bay, offshore B Not Supporting 5 Dissolved Oxygen, Enterococcus, Turbidity VI-STT-55 Brewers Bay B Not Supporting 5 Enterococcus VI-STT-56 Perseverance Bay B Partially Supporting 2 VI-STT-57 Fortuna Bay B Fully Supporting 1 VI-STT-58 Fortuna Bay subwatershed, offshore B Insufficient Information 3 VI-STT-59 Northwest St. Thomas HUC14, offshore B Insufficient Information 3 The assessment unit/impairment combinations classified under category 5 comprise the U.S. Virgin Islands’ 303(d) list. The list is included in this report as Appendix A. Compared to the approved 2018 2020 USVI Integrated Report 303(d) list, 51 assessment unit/impairment combinations have been added to the list and 50 assessment unit/impairment combinations have been removed from the list, or delisted. Forty-five of the list combination removals were based on data showing the water quality standard was met during the four years between October 2015 and September 2019. For five list combination removals, the combination had been included although there was already an existing approved TMDL. The list of assessment unit/impairment combinations that were removed in comparison to the 2018 303(d) list is included as Appendix B. Figures 4 and 5 represent the results of the 2020 assessment for St. Croix, St. Thomas and St. John. For assessment units with TMDLs that also have impairments, the overall category is category 5 (shown in red). Figure 4: St. Croix Assessment Result Categories 2020 USVI Integrated Report Figure 5: St. Thomas and St. John Assessment Result Categories Under Section 314 of the Clean Water Act, states are required to submit the following information about the status of publicly owned lakes: • An identification and classification according to eutrophic condition of all lakes. • A description of procedures, processes, and methods (including land use requirements), to control sources of pollution to lakes. • A description of methods and procedures to restore the quality of lakes. • Methods and procedures to mitigate the harmful effects of high acidity. • A list and description of those publicly owned lakes known to be impaired. • An assessment of the status and trends of water quality in lakes. Lakes are standing bodies of open water that contribute surface water flow in a typical year to a territorial sea. There are no natural lakes in the U.S. Virgin Islands. (USDA, 2000) 7. Wetlands Program Wetlands in the U.S. Virgin Islands occupy less than three percent of the land area. Based on mapping by the U.S. Geological Survey (USGS, 1996), there are 960 acres of wetlands on St. Croix, 320 acres of wetlands on St. Thomas, and 425 acres of wetlands on St. John. There is currently no wetlands management program in the U.S. Virgin Islands, though wetlands form a part of several programs and there are policies and legal mandates for management of wetlands. 2020 USVI Integrated Report Wetlands provide a range of resources and services that contribute to the economic and social development of the U.S. Virgin Islands. However, various development activities result in significant degradation of the very resources that support the development of the U.S. Virgin Islands. In an effort to improve the overall development process to minimize the negative anthropogenic effects, policies, laws, and initiatives have been developed to protect our natural resources. The primary purpose of these associated laws and programs is to ensure that development can be sustained, and the quality of life can be maintained for current and future generations of Virgin Islanders while at the same time protecting these natural resources. As defined by 12 VIRR §184 de (2007), “Wetlands means those areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs, and similar areas.” Each type of wetland is formed under a specific set of conditions and will typically have associated plants (flora) and animals (fauna). Type 1: Watercourses A watercourse is defined in the Virgin Islands Code as “… any stream with a reasonable well-defined channel, and includes streams which have a permanent flow, as well as those which result from the accumulation of water after rainfall and which regularly flow through channels formed by the force of the waters.” See 12 V.I.C. § 123(b). In the U.S. Virgin Islands, watercourses are commonly referred to as ghuts or guts. These ghuts are the main drainage channels for discharge of runoff from rainfall events. In addition to that function, ghuts provide a range of services that support the development processes of the U.S. Virgin Islands. Ghuts also contain permanent pools of freshwater, which function as habitats for rare species of aquatic animals (e.g. mountain mullet and American eel). Ghuts take a range of shapes, sizes, and depths, depending on the terrain and the size of the watershed. The vegetation found inside ghuts also varies accordingly, but two distinct forest types have been associated with ghuts. These forest types are gallery moist forest and gallery shrubland. A list of the ghuts of interest in the U.S. Virgin Islands is provided in Table 13. Ghuts of interest are those that meet any one of the following criteria: • Ghuts with permanent pools • Ghuts currently used for recreational purposes • Ghuts supporting other community uses • Ghuts containing critical habitats • Ghuts supporting endangered species of plants or animals • Ghuts containing significant historic, archeological, or cultural resources • Ghuts facing significant threats – e.g. dumping from construction activities or used for sewage disposal. 2020 USVI Integrated Report Table 13: Ghuts of Interest in the U.S. Virgin Islands St. Croix St. John St. Thomas Adventure Stream Battery Gut Bonne Resolution (Dorothea) Gut Bethlehem Gut Fish Bay Gut Caret Bay/Sorgenfri Ghut Butler Bay Ghut Guinea Gut Contant Gut Caledonia Gut Johnny Horn Ghut deJongh Gut Canaan Ghut Living (Reef Bay) Gut Magens Bay Gut Cane Bay Ghut Nadir Gut Creque Gut Neltjeberg Gut Fountain Ghut Santa Maria Gut Harden Gut Savan Gut Jolly Hill Gut Turpentine Run La Grange Gut Mahogany Gut River Gut Type 2: Marshes A marsh is defined as “a water-saturated, poorly drained area, intermittently or permanently water covered, having aquatic and grass-like vegetation” (http://water.usgs.gov/water-basics_glossary.html). Marshes in the U.S. Virgin Islands are typically fresh-water wetlands formed in depressions in the landscape and maintained by surface or subsurface flow of water. Type 3: Swamps A swamp is defined as “an area intermittently or permanently covered with water and having trees and shrubs” (http://water.usgs.gov/water-basics_glossary.html). In the U.S. Virgin Islands, swamps are generally located on the coast. Water level is determined mainly by surface runoff during the rainy season, but brackish conditions exist in areas of the swamp closest to the sea, or during the dry season. As a result of this salinity gradient, plants adapted to both fresh water and saline conditions may be found in some swamps (e.g. Magen’s Bay swamp in St. Thomas). Type 4: Artificial Ponds and Impoundments A pond is a body of standing water, either natural or man-made, that is usually smaller than a lake. In the U.S. Virgin Islands, man-made (artificial) ponds are created primarily for provision of water for agricultural purposes. Increasingly, ponds are created for storm-water management purposes on sites with large developments or on sites that are periodically flooded. An impoundment is a body of water resulting from the placement of a stone dyke or earthen berm across a natural drainage channel (ghut). Impoundments were used in the early 1900s as part of the system of collection and distribution of potable water, particularly on St. Croix. Currently, impoundments are constructed and used mainly to provide water for agricultural purposes. Both ponds and impoundments provide habitats for a range of resident and migratory species of water birds. 2020 USVI Integrated Report Type 5: Salt Ponds A salt pond is a coastal wetland that is separated from the sea by a low sandbank, sand dune, or similar feature. Salt ponds are formed over long periods by the accretion of reefs, growth of mangroves, or the accretion of sand along the mouth of an embayment. Once the pond is separated from the sea, water exchange between the two is primarily through the separating barrier. Depending on the size and structure of the salt pond, openings to the sea may be created during the rainy season if the pond collects significant amounts of surface runoff. The barrier may also be overtopped by the sea during periods of significant wave action. Such wetlands are commonly called salt ponds because the water in the ponds becomes hypersaline during the periods when the water level is low; that is, the water becomes more saline than ordinary sea water. In some ponds, the salt can be seen as a crystalline deposit along the edges of the pond or towards the landward portion (back) of the pond. Salt ponds provide a habitat for many species of birds, but few plants are adapted to survive in such hypersaline conditions. Plants typically found at salt ponds are black mangrove, white mangrove, and the shrubs saltwort and sea purslane. Type 6: Lagoons A lagoon is defined as “a stretch of salt water separated from the sea by a low sandbank, coral reef or similar natural or manmade feature.” In the U.S. Virgin Islands, lagoons are typically formed by one of two processes. One process involves wave action moving sand and gravel along the shoreline, periodically closing the mouth of an embayment. Sandbars are sometimes breached by strong wave action, particularly during storms. Sandbars/sandbanks often become colonized and stabilized by plants, which can result in the closure becoming semi-permanent or permanent over time. The second process involves the formation of a sandbar across the mouth of a seasonal stream (ghut). In such cases, the sandbar is periodically breached by wave action or by surface runoff discharged through the ghut after rainfall events. Lagoons can have very restricted access or narrow channels that permit fairly consistent flows between the lagoon and the sea. Lagoons are ecologically productive sites, providing habitats for a range of fish and bird species, including migratory species of birds. Examples of lagoons are the Altona Lagoon (St. Croix) and Benner Bay/Mangrove Lagoon (St. Thomas). Type 7: Seagrass beds Seagrass beds are ecosystems dominated by marine grasses. Seagrass beds typically inhabit shallow nearshore areas but can be found in a range of depths from shallow lagoons to open coastal areas 60 feet in depth. There are 40-50 species of seagrasses world-wide, and most are found in the tropics. Though seagrass beds are dominated by seagrasses, the communities contain many species of algae. Seagrass beds function as important nursery areas for a wide variety of marine organisms (including important food species). Seagrass beds also function to colonize open areas, and their root systems help to stabilize unconsolidated soils. The major issues and priorities currently relevant to wetlands are: 2020 USVI Integrated Report a) Integration of the Policy Framework There are several laws relevant to the management of wetlands, and those laws are administered by several agencies. The programs managed by the various agencies are usually in line with national priorities. In 2010, the Department of Planning and Natural Resources initiated activities to develop a Wetlands Management Program. That program was to establish a mechanism for integration of the wetlands-related policies and programs of the public agencies in the U.S. Virgin Islands, including the involvement of community organizations. However, since that time the program integration has stalled. b) Reduction of Threats There are significant threats to wetlands and associated resources from natural and man-made sources. The man-made threats are primarily from land use activities (e.g. changed drainage, sediment from construction activities, filling of wetlands, disposal of solid waste and effluents), but also from illegal practices (e.g. solid waste disposal). These threats reduce the benefits provided by wetlands. While threat reduction is a priority of the management agencies, the most important require changes in attitudes and practices of individuals in the community. c) Storm Water Management Due to the topography of the islands, most development activities (including residential development) involve the channeling of surface runoff from rainfall events. Poor storm-water management practices result in damage to wetlands, social infrastructure (e.g. roads), and private property. Individuals and companies undertaking developments must therefore use best practices in the design of stormwater management systems. d) Future Demand for Goods and Services from Wetlands The existing uses of wetlands are expected to continue. There is increased use for recreation, including eco-tourism ventures. With increased development activity, particularly larger resort projects, there is increased use of wetlands for storm-water management. It is forecasted that global warming will increase rainfall variability and intensity. As such, wetlands will play an even greater role in flood protection. Information Management In order to make informed decisions concerning the management of wetland resources, the regulatory agencies are constantly updating the databases on physical conditions and status of the resources. The community should become engaged in the management process, especially by sharing information on the use of wetlands and associated resources, and threats to such resources. 8. Trends Analysis Water quality in the U.S. Virgin Islands is generally good but declining, due to an increase in point and nonpoint source discharges into the marine environment. Sources such as direct discharges, stormwater run-off and vessel wastes are stressors on U.S. Virgin Islands waters. 2020 USVI Integrated Report a) Surface Water Nonpoint source pollution is the major source of surface water contamination in the Virgin Islands. Nonpoint source pollution sources are diffuse in nature and can be attributed to several causes such as: • Failure to properly install effective silt control devices during construction, • Failure to contain storm water run-off from unpaved roads, • Failure of on-site disposal systems, • Resident (native and introduced) and migratory wildlife loading (direct loading and indirect loading, through for example, the grazing on plants that provide ground cover and help control erosion). The discharging of wastes overboard directly into the sea by boat owners and the difficulty in regulating such activity also contributes to nonpoint source pollution problems seen in the U.S. Virgin Islands. In addition, sewage contributions can be attributed to an antiquated municipal sewage system. Poor preventive maintenance practices due to lack of funding and other resources within the Waste Management Authority result in “bypasses” that result in the release of untreated sewage directly into the waters of the U.S. Virgin Islands. The Government of the U.S. Virgin Islands has made considerable progress towards resolving these issues by the upgrading of new treatment plants and upgrading other portions of the municipal system. b) Ground Water • The primary sources of groundwater contamination in the U.S. Virgin Islands are: Bacteriological contamination from failing septic systems • Leaking municipal sewer lines • Migration of contamination from previous injections and disposal practices • Frequent sewage bypasses (generally described as discharges direct to the sea, but with some percolation into sub-soils) Other sources of ground water contamination include intrusion of salt water caused by the over- pumping of the aquifers, invasion of volatile organic compounds, contamination from leaking underground storage tanks, and the indiscriminate/illegal discharges of waste. 9. Priority Scheme for TMDL Development As discussed in the wetlands section, two priority sites identified from the 2018 U.S. Virgin Islands Coral Reef Management Program are the St. Thomas East End Reserve and the St. Croix East End Marine Park. The 21 assessment units associated with these areas are classified as high priority for TMDL development for the 2020 cycle. The assessment units were identified based on shape files from the World Database on Protected Areas (https://www.protectedplanet.net/), current as of January 2020. The World Database on Protected Areas is a joint project between the United Nations and the 2020 USVI Integrated Report International Union for Conservation of Nature. The compilation and management of the database is carried out by UN Environment World Conservation Monitoring Centre, in collaboration with governments, non-governmental organizations, academia and industry. There are monthly updates of the data which are made available online through the Protected Planet website where the data is both viewable and downloadable. An additional 10 assessment units are classified as high priority because TMDLs for these assessment units are already in development. The 49 assessment units in other marine protected areas are designated as medium priority. The remaining 97 assessment units that do not overlap with protected areas are designated as low priority. The TMDL priority is included in Appendix C. The TMDL prioritization scheme used for this cycle will need to be revised in future cycles. As part of the U.S. Virgin Islands water quality standards promulgation expected to be completed in 2020, all areas where water quality constituents are found to result in adverse impacts to seagrass and coral habitat conditions based on the availability of data to quantify anthropogenic pollutant loads and model their fate and effects, and pending availability of resources, will be designated as medium and high priority for TMDL development. As of the writing of this report, the water quality standards have not been promulgated. Upon promulgation, it is expected that it will take four years to develop and implement a monitoring plan to determine potentially impacted areas. The U.S. Virgin Islands can re-evaluate the current priority scheme in each subsequent assessment cycle, and would likely include prioritization, based on the water quality standards promulgation, during the 2024 or 2026 assessment cycle. C. Ground Water Monitoring and Assessment The water quality management program is not tasked with monitoring the groundwaters of the U.S. Virgin Islands. The water quality management program has been informed by the DPNR-Division of Environmental Protection’s Groundwater Program that the only groundwaters that are monitored throughout the territory are those that are potable water sources. The monitoring is required through the DPNR-Division of Environmental Protection’s public water systems supervision program. D. Public Participation Recognizing that stakeholders throughout the U.S. Virgin Islands collect valuable water quality data, the DPNR has established a process that allows groups and individuals to submit information for use in the territory’s assessment work. On September 20, 2019, the DPNR published a notice for solicitation of water quality data to support the development of the 2020 integrated water quality monitoring and assessment report. Data packages, which include data collected from October 1, 2017 to September 30, 2019, were accepted until October 20, 2019. Data collected after October 20, 2019 and data packages submitted after this time period may be considered for subsequent assessments. The DPNR uses all appropriate and readily available data collected by governmental and non-governmental entities. In determining which data are appropriate and readily available, the DPNR considers quality assurance/quality control, monitoring design, age of data, accurate sampling location information, data documentation and use of electronic data management. Data packages submitted for consideration must include: • A DPNR-approved or comparable to a DPNR-approved quality assurance/quality control project plan; 2020 USVI Integrated Report • Data provided in electronic format. Preferably data is entered into the U.S. EPA’s STORET database. The DPNR also accepts data in Excel, Access, and/or delimited text file formats. Station location data should be identified by latitude and longitude; and • A citable report summarizing the data that includes name, address, and telephone number of the entity that generated the data set. No public hearings were held. The DPNR provides the opportunity for formal public comment on its draft 303(d) list. The public comment period for the draft 303(d) list is typically announced in even- numbered years on the DPNR website. Comments are accepted during a 30-day period. Following the close of the 30-day comment period, a written response to comments and petitions is developed as soon as possible. All petitions and comments received during the public notice period are considered. E. References Bureau of Economic Analysis, U.S. Department of Commerce (2019). BEA 19-66 Gross Domestic Product for the U.S. Virgin Islands (USVI), 2018. (https://www.bea.gov/news/2019/gross-domestic- product-us-virgin-islands-usvi-2018) The Cadmus Group (2011). Watershed characterization and planning for pathogen source reduction in the U.S. Virgin Islands. Prepared for the U.S. EPA. Kendall, M.S., M.E. Monaco, K.R. Buja, J.D. Christensen, C.R. Kruer, and M. Finkbeiner, R.A. Warner, NOAA (2001). Methods Used to Map the Benthic Habitats of Puerto Rico and the U.S. Virgin Islands. NOAA (2012). NOAA ARRA USVI Watershed Stabilization Project Fish Bay, St. John Drainage Improvements. ftp://ftp.library.noaa.gov/noaa_documents.lib/CoRIS/Watershed_Stabilization_Proj_Fish_Bay.pdf NOAA, National Centers for Coastal Ocean Science (2002). Benthic Habitat Mapping in Puerto Rico and the U.S. Virgin Islands for a Baseline Inventory. Shape files available at https://coastalscience.noaa.gov/project/benthic-habitat-mapping-puerto-rico-virgin-islands/ Storlazzi, C.D., Reguero, B.G., Cole, A.D., Lowe, E., Shope, J.B., Gibbs, A.E., Nickel, B.A., McCall, R.T., van Dongeren, A.R. and Beck, M.W. 2019. Rigorously valuing the role of U.S. coral reefs in coastal hazard risk reduction. U.S. Geological Survey Open-File Report 2019-1027. 42pp. https://doi.org/10.3133/ofr20191027. U.S. Department of Agriculture (2000). Published Soil Surveys for Virgin Islands. Available at: https://www.nrcs.usda.gov/Internet/FSE_MANUSCRIPTS/puerto_rico/PR690/0/VI.pdf U.S. EPA (2016). Clean Watersheds Needs Survey 2012. Report to Congress, EPA-830-R-15005. U.S. EPA, Office of Research and Development (1978). Microbiological Methods for Monitoring the Environment: Water and Wastes, EPA 600-8-78-017. U.S. EPA, Office of Water (August 1, 2001). The National Costs of the Total Maximum Daily Load Program (Draft Report), EPA 841-D-01-003. 2020 USVI Integrated Report U.S. EPA, Office of Water (2012). Recreational Water Quality Criteria, EPA 820-F-12-058. Retrieved from https://www.epa.gov/wqc/2012-recreational-water-quality-criteria-documents U.S. Geological Survey (1996). National Water Summary on Wetland Resources, Water Supply Paper 2425. Compiled by Judy D. Fretwell, John S. Williams and Phillip J. Redman, page 369-374. Retrieved from: https://doi.org/10.3133/wsp2425 U. S Virgin Islands, DPNR (2018). Fiscal Year 2018 End-of-the-year Report, Nonpoint Source Pollution Management Program. Reporting Period: October 1, 2017 through September 30, 2018. Van Beukering, P.J.H., L. Brander, B. van Zanten, E. Verbrugge and K. Lems (2011). The Economic Value of the Coral Reef Ecosystems of the United States Virgin Islands. Report number R-11/06. 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STC-02 Frederiksted Harbor STC-29, STC-28, VI970611 Low C Enterococcus 2018, 2020 2028 VI-STC-02 Frederiksted Harbor STC-28 Low C pH 2020 2028 VI-STC-04 Prosperity, nearshore VI252619 Low B Enterococcus 2018, 2020 2028 VI-STC-04 Prosperity, nearshore VI252619 Low B Turbidity 2010, 2014, 2016, 2018, 2020 2028 VI-STC-06 Sprat Hall Beach STC-30 Low B pH 2020 2028 VI-STC-12 Cane Bay STC-32, VI201013 Low B Dissolved Oxygen 2018 2025 VI-STC-12 Cane Bay STC-32, VI201013 Low B Enterococcus 2018, 2020 2025 VI-STC-12 Cane Bay STC-32 Low B pH 2020 2025 VI-STC-12 Cane Bay STC-32, VI201013 Low B Phosphorus 2016, 2018 2025 VI-STC-12 Cane Bay STC-32, VI201013 Low B Turbidity 2010, 2012, 2014, 2016, 2018 2025 VI-STC-13 Baron Bluff, subwatershed STC-31, VI398766 Low B Dissolved Oxygen 2010, 2012, 2014, 2018 2025 VI-STC-13 Baron Bluff subwatershed STC-31 Low B pH 2020 2025 VI-STC-16 Salt River Lagoon, Marina STC-33, STC-33C High B Enterococcus 2010, 2012, 2014, 2018, 2020 2022 VI-STC-16 Salt River Lagoon, Marina STC-33 High B Transparency/Clarity 2020 2022 VI-STC-18 Salt River Bay STC-33A STC-33B VI146901 VI558328 High B Enterococcus 2010, 2012, 2014, 2016, 2018, 2020 2022 VI-STC-18 Salt River Bay STC-33A High B pH 2020 2023 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STC-18 Salt River Bay STC-33A STC-33B VI146901 VI558328 High B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2022 VI-STC-23 St. Croix-By-the-Sea STX-20 Low B Enterococcus 2020 2026 VI-STC-23 St. Croix-By-the-Sea STC-34, VI738082 Low B pH 2010, 2012, 2014, 2020 2026 VI-STC-24 Long Reef Backreef, west STC-48 Low C pH 2020 2026 VI-STC-25 Princess subwatershed, offshore STC-35 Low B pH 2020 2028 VI-STC-26 Christiansted Harbor STC-37 STC-40 STC- 41 STC-42 STC-43 STC-44 STC-45 STC- 46 STC-47 STC-49 VI572166 Low C pH 2016, 2020 2028 VI-STC-26 Christiansted Harbor STC-37 STC-40 STC- 41 STC-42 STC-43 STC-44 STC-45 STC- 46 STC-47 STC-49 VI572166 Low C Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2028 VI-STC-27 Long Reef Forereef, east STC-36 Low B pH 2020 2028 VI-STC-29 Christiansted Harbor, east STX-25 Low C Enterococcus 2020 2028 VI-STC-29 Christiansted Harbor, East STC-1, STC-39 Low C pH 2016, 2020 2028 VI-STC-29 Christiansted Harbor, East STC-1, STC-39 Low C Turbidity 2010, 2012, 2014, 2018, 2020 2028 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STC-30 Beauregard Bay STC-2, STC-38, VI213332 Low B Enterococcus 2018, 2020 2026 VI-STC-30 Beauregard Bay STC-2, STC-38, VI213332 Low B pH 2016, 2020 2026 VI-STC-30 Beauregard Bay STC-2, STC-38, VI213332 Low B Phosphorus 2018 2026 VI-STC-30 Beauregard Bay STC-2, STC-38, VI213332 Low B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2026 VI-STC-31 Buccaneer Beach STC-3, VI651587 Low B Enterococcus 2018, 2020 2034 VI-STC-31 Buccaneer Beach STC-3 Low B pH 2020 2034 VI-STC-33 Punnett Bay VI610321 High B Enterococcus 2018, 2020 2023 VI-STC-33 Punnett Bay VI610321 High B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2022 VI-STC-34 Punnett Point, east STC-4 Low B Dissolved oxygen 2020 2031 VI-STC-34 Punnett Point, east STC-4 Low B Enterococcus 2020 2031 VI-STC-34 Punnett Point, east STC-4 Low B pH 2020 2031 VI-STC-34 Punnett Point, east STC-4 Low B Turbidity 2020 2031 VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) STC-5 High B Dissolved oxygen 2020 2023 VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) STC-5 High B Enterococcus 2020 2022 VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) STC-5 High B pH 2020 2023 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) STC-5 High B Transparency/Clarity 2020 2023 VI-STC-36 Green Cay Beach VI563397 High B Enterococcus 2010, 2012, 2014, 2018, 2020 2022 VI-STC-36 Green Cay Beach VI563397 High B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2023 VI-STC-37 Southgate Subwatershed, Offshore STC-5 High B Dissolved Oxygen 2010, 2014, 2016, 2018, 2020 2023 VI-STC-37 Southgate Subwatershed, Offshore STC-5 High B Enterococcus 2010, 2014, 2016, 2020 2022 VI-STC-37 Southgate Subwatershed, Offshore STC-5 High B Turbidity 2010, 2014, 2016, 2020 2022 VI-STC-39 Teague Bay STC-8, STC-9, VI381319, UVI-Supp High B pH 2010, 2012, 2014, 2020 2022 VI-STC-40 Teague Bay Backreef STC-10 High B Dissolved oxygen 2020 2023 VI-STC-40 Teague Bay Backreef STC-10, VI351774 High B pH 2010, 2012, 2014, 2020 2022 VI-STC-41 Buck Island Backreef STC-7 Medium A pH 2020 2024 VI-STC-41 Buck Island Backreef STC-6, STC-7 Medium A Temperature 2018, 2020 2024 VI-STC-46 Grapetree Bay STC-11B High B pH 2020 2022 VI-STC-47 Turner Hole Backreef STC-12 High B Dissolved oxygen 2020 2022 VI-STC-47 Turner Hole Backreef VI297470 High B Enterococcus 2010, 2012, 2014, 2016, 2018, 2020 2022 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STC-47 Turner Hole Backreef STC-12 High B pH 2020 2022 VI-STC-49 Madam Carty Backreef STC-13B High B Dissolved oxygen 2020 2022 VI-STC-49 Madam Carty Backreef STC-13B High B pH 2020 2022 VI-STC-52 Great Pond Bay STC-13A High B Dissolved oxygen 2020 2022 VI-STC-52 Great Pond Bay STC-13A High B pH 2020 2022 VI-STC-56 Bugby Hole Backreef STC-14A, STC-14B, VI931289 Low B Enterococcus 2010, 2012, 2014, 2018, 2020 2033 VI-STC-56 Bugby Hole Backreef STC-14A, STC-14B, VI931289 Low B pH 2016, 2020 2033 VI-STC-56 Bugby Hole Backreef STC-14A, STC-14B, VI931289 Low B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2033 VI-STC-59 Canegarden Bay STC-15, STC-15A Low B Dissolved Oxygen 2016, 2018 2025 VI-STC-59 Canegarden Bay STC-15A Low B pH 2020 2025 VI-STC-59 Canegarden Bay STC-15, STC-15A Low B Turbidity 2010, 2014, 2018, 2020 2025 VI-STC-61 Hess Oil Virgin Islands Harbor STC-16 Low C pH 2020 2033 VI-STC-61 Hess Oil Virgin Islands Harbor STC-16, STC-17 Low C Turbidity 2010, 2014, 2018 2033 VI-STC-62 Limetree Bay STC-18 Low B Dissolved Oxygen 2016 2033 VI-STC-62 Limetree Bay STC-18 Low B pH 2020 2033 VI-STC-63 Martin-Marietta Alumina Harbor STC-19, STC-20 Low C Dissolved Oxygen Prior to 2010, 2016, 2020 2033 VI-STC-63 Martin-Marietta Alumina Harbor STC-19 Low C pH 2020 2033 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STC-63 Martin-Marietta Alumina Harbor STC-19 Low C Turbidity 2020 2033 VI-STC-64 Manning Bay/Estate Anguilla Beach STC-23 Low B Dissolved Oxygen 2016, 2018 2033 VI-STC-64 Manning Bay/Estate Anguilla Beach STC-23 Low B pH 2020 2033 VI-STC-65 Hovensa, west STC-21 Low B Dissolved Oxygen 2016, 2018 2033 VI-STC-65 Hovensa, west STC-21 Low B pH 2020 2033 VI-STC-66 Hovensa subwatershed, offshore STC-22A Low B pH 2020 2033 VI-STC-75 Diamond Subwatershed, Offshore STC-24B Low B Chronic Toxicity 2010, 2014, 2020 2029 VI-STC-75 Diamond Subwatershed, Offshore STC-24B Low B Dissolved Oxygen 2010, 2014, 2016, 2018 2029 VI-STC-75 Diamond subwatershed, offshore STC-24B Low B pH 2020 2029 VI-STC-75 Diamond subwatershed, offshore STC-24B Low B Turbidity 2020 2029 VI-STC-77 Long Point Bay STC-25 Low B pH 2020 2029 VI-STC-77 Long Point Bay STC-25 Low B Transparency/Clarity 2020 2029 VI-STC-77 Long Point Bay STC-25 Low B Turbidity 2016, 2018, 2020 2029 VI-STC-79 Good Hope Beach STC-26 Low B pH 2020 2029 VI-STC-79 Good Hope Beach STC-26 Low B Transparency/Clarity 2020 2029 VI-STC-82 Sandy Point, nearshore west STC-27 Medium B pH 2020 2024 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STC-82 Sandy Point, Nearshore West STC-27, VI896490, VI907985 Medium B Turbidity 2010, 2012, 2014, 2018, 2020 2024 VI-STJ-01 Caneel Bay STJ-54, NPS-1, VI658467 Medium B Dissolved Oxygen Prior to 2010, 2020 2024 VI-STJ-01 Caneel Bay STJ-54, NPS-1, VI658467 Medium B Turbidity Prior to 2010, 2020 2024 VI-STJ-02 Hawksnest Bay STJ-44B, NPS-3, NPS-4, VI255380 Medium B Enterococcus 2018, 2020 2024 VI-STJ-02 Hawksnest Bay STJ-44B, NPS-3, NPS-4, VI255380 Medium B Turbidity 2018, 2020 2024 VI-STJ-03 Trunk Bay STJ-44A, NPS-5 Medium A Enterococcus 2018, 2020 2024 VI-STJ-05 Cinnamon Bay STJ-44C, NPS-6, NPS-7 Medium B Enterococcus 2018, 2020 2024 VI-STJ-13 Round Bay STJ-57 High B Temperature 2020 2023 VI-STJ-15 Coral Harbor STJ-53 High B Dissolved Oxygen 2020 2023 VI-STJ-15 Coral Harbor VI823989 High B Enterococcus 2018 2023 VI-STJ-15 Coral Harbor STJ-53 High B Turbidity 2020 2023 VI-STJ-16 Coral Bay STJ-58 Medium B Enterococcus 2018 2023 VI-STJ-23 Fish Bay STJ-48 High B Dissolved Oxygen 2016, 2020 2023 VI-STJ-23 Fish Bay STJ-48 High B pH 2010, 2020 2023 VI-STJ-23 Fish Bay STJ-48 High B Phosphorus 2016, 2020 2023 VI-STJ-23 Fish Bay STJ-48 High B Transparency/Clarity 2020 2024 VI-STJ-23 Fish Bay STJ-48 High B Turbidity 2010, 2016, 2018, 2020 2023 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STJ-28 Great Cruz Bay STJ-45, NPS-25, VI779192 Low B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2026 VI-STJ-30 Cruz Bay STJ-43A, STJ-43B, STJ-43C, STJ-43D, NPS-27, NPS-28, NPS-29, VI309453 Medium B Enterococcus 2012, 2014, 2018, 2020 2024 VI-STJ-30 Cruz Bay STJ-43A, STJ-43B, STJ-43C, STJ-43D, NPS-27, NPS-28, NPS-29, VI309453 Medium B Turbidity 2012, 2014, 2016, 2018, 2020 2024 VI-STJ-31 Great Cruz Bay Watershed, Offshore VI456779 Medium B Enterococcus 2018, 2020 2024 VI-STJ-31 Great Cruz Bay Watershed, Offshore VI456779 Medium B Turbidity Prior to 2010, 2018, 2020 2024 VI-STJ-32 Southwest St. John HUC 14, Offshore STJ-OFF4 Medium B Turbidity 2014, 2020 2023 VI-STT-01 Botany Bay STT-9 Low B Turbidity 2016, 2018, 2020 2029 VI-STT-02 Stumpy Bay STT-10 Low B Turbidity Prior to 2010, 2016, 2020 2029 VI-STT-04 Santa Maria Bay STT-11 Low B Turbidity 2010, 2016, 2020 2029 VI-STT-05 Caret Bay STT-12 Low B Turbidity Prior to 2010, 2016, 2018 2029 VI-STT-08 Hull Bay STT-14, VI616865 Low B Enterococcus 2018, 2020 2026 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STT-08 Hull Bay STT-14, VI616865 Low B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2026 VI-STT-10 Magen's Bay STT-15, STT-15A, STT-15B, VI672756 Medium B Enterococcus 2010, 2012, 2014, 2018, 2020 2024 VI-STT-10 Magen's Bay STT-15, STT-15A, STT-15B, VI672756 Medium B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2024 VI-STT-13 Mandahl Bay (Marina) STT-16B, STT-16C Low B Dissolved Oxygen 2010, 2012, 2014, 2016, 2020 2031 VI-STT-13 Mandahl Bay (Marina) STT-16B, STT-16C Low B Phosphorus 2018, 2020 2031 VI-STT-13 Mandahl Bay (Marina) STT-16B, STT-16C Low B Turbidity 2016, 2020 2031 VI-STT-17 Mandahl Bay Subwatershed, Offshore STT-16A, STT-18, VI577932 Low B Dissolved Oxygen 2020 2028 VI-STT-17 Mandahl Bay Subwatershed, Offshore STT-16A, STT-18, VI577932 Low B Enterococcus 2016, 2018, 2020 2028 VI-STT-17 Mandahl Bay Subwatershed, Offshore STT-16A, STT-18, VI577932 Low B Turbidity 2010, 2012, 2016, 2018, 2020 2028 VI-STT-18 Water Bay STT-19 Low B Dissolved oxygen 2020 2027 VI-STT-18 Water Bay STT-19, VI591668 Low B Enterococcus 2018, 2020 2027 VI-STT-19 Smith Bay STT-20, VI431925 Medium B Enterococcus 2018, 2020 2024 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STT-22 Red Bay STT-21B Low B Dissolved Oxygen Prior to 2010, 2016, 2018, 2020 2028 VI-STT-22 Red Bay STT-21B Low B Enterococcus 2018, 2020 2028 VI-STT-22 Red Bay STT-21B Low B Turbidity Prior to 2010, 2016, 2020 2028 VI-STT-23 Vessup Bay STT-22B Low B Enterococcus 2010, 2012, 2014, 2018, 2020 2028 VI-STT-23 Vessup Bay STT-22B Low B Turbidity 2016, 2020 2028 VI-STT-25 Great Bay STT-23, VI505006 High B Enterococcus 2018 2023 VI-STT-28 Cowpet Bay STT-24, STT-24A High B Enterococcus 2018, 2020 2023 VI-STT-31 Nazareth Bay VI389422 High B Enterococcus 2018, 2020 2023 VI-STT-34 Benner Bay Lagoon Marina STT-27D, STT-27E High B Enterococcus 2010, 2012, 2014, 2018, 2020 2021 VI-STT-34 Benner Bay Lagoon Marina STT-27D, STT-27E High B Turbidity 2016, 2020 2023 VI-STT-35 Mangrove Lagoon STT-27A, STT-27B, STT-27C High B Enterococcus 2010, 2012, 2014, 2018, 2020 2021 VI-STT-35 Mangrove Lagoon STT-27A, STT-27B, STT-27C High B Turbidity 2016, 2020 2023 VI-STT-36 Frenchman Bay Subwatershed East STT-28A, STT-28B, VI951607 High B Enterococcus 2018 2022 VI-STT-36 Frenchman Bay Subwatershed East STT-28A, STT-28B, VI951607 High B Phosphorus 2016 2022 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STT-36 Frenchman Bay Subwatershed East STT-28A, STT-28B, VI951607 High B Turbidity 2010, 2012, 2016, 2018, 2020 2022 VI-STT-37 Frenchman Bay STT-29A, VI891065 Low B Enterococcus 2016, 2018, 2020 2027 VI-STT-37 Frenchman Bay STT-29A, VI891065 Low B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2027 VI-STT-38 Limetree Bay STT-29B, VI776527 Low B Enterococcus 2018, 2020 2027 VI-STT-38 Limetree Bay STT-29B, VI776527 Low B Turbidity 2010, 2012, 2016, 2018, 2020 2027 VI-STT-39 Morningstar Bay STT-30, VI937158 Low B Turbidity 2010, 2012, 2016, 2020 2027 VI-STT-43 St. Thomas Harbor, Inner STT-31B, STT-31C, STT-32A, STT-32B, STT-33A, STT-33B, STT-34, STT-35, STT- 36, STT-37, STT-38 Medium C Turbidity 2010, 2012, 2014, 2016, 2020 2024 VI-STT-46 Sprat Bay STT-42 Low B Turbidity 2016, 2020 2032 VI-STT-51 Krum Bay STT-4 Low C Turbidity 2016, 2018 2034 VI-STT-52 Lindbergh Bay STT-5A, STT-5B, VI514102 Low B Enterococcus 2018, 2020 2034 VI-STT-52 Lindbergh Bay STT-5A, STT-5B, VI514102 Low B Turbidity 2010, 2012, 2014, 2016, 2018, 2020 2034 VI-STT-54 Perseverance Bay, Offshore STT-6B Low B Dissolved Oxygen 2020 2035 2020 USVI Integrated Report Appendix A: 303(d) list AU ID AU Name Associated Monitoring Stations Priority Class Impairment Years impaired TMDL Completion VI-STT-54 Perseverance Bay, Offshore STT-6B Low B Enterococcus 2018, 2020 2035 VI-STT-54 Perseverance Bay, Offshore STT-6B Low B Turbidity 2010, 2012, 2016, 2020 2035 VI-STT-55 Brewers Bay STT-7A, VI293962 Low B Enterococcus 2018, 2020 2035 2020 USVI Integrated Report Appendix B: Combinations removed from the previous 303(d) list AU ID AU Name Class Impairment Years impaired Delist Justification Notes VI-STC-02 Frederiksted Harbor C Turbidity 2010, 2012, 2014, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-06 Sprat Hall Beach B Enterococcus 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-13 Baron Bluff, subwatershed B Turbidity 2010, 2012, 2014, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-23 St. Croix-By-the-Sea B Turbidity 2010, 2012, 2014, 2016, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-39 Teague Bay B Turbidity 2010, 2012, 2014, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-40 Teague Bay Backreef B Enterococcus 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-40 Teague Bay Backreef B Turbidity 2010, 2012, 2014, 2016, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-47 Turner Hole Backreef B Turbidity 2010, 2012, 2014, 2016, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-61 Hess Oil Virgin Islands Harbor C Enterococcus 2010, 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment 2020 USVI Integrated Report Appendix B: Combinations removed from the previous 303(d) list AU ID AU Name Class Impairment Years impaired Delist Justification Notes VI-STC-66 Hovensa subwatershed, offshore B Temperature 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-77 Long Point Bay B Dissolved oxygen 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STC-79 Good Hope Beach B Dissolved oxygen 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STJ-13 Round Bay B Dissolved oxygen 2016 Applicable WQS attained; original basis for listing was incorrect No exceedances since 2016; all current data shows WQS attainment VI-STJ-13 Round Bay B Enterococcus 2010, 2012, 2014, 2018 Applicable WQS attained; original basis for listing was incorrect No exceedances since 2016; all current data shows WQS attainment VI-STJ-13 Round Bay B pH 2010, 2012, 2014 Applicable WQS attained; original basis for listing was incorrect No exceedances since 2016; all current data shows WQS attainment VI-STJ-13 Round Bay B Phosphorus Applicable WQS attained; original basis for listing was incorrect Incorrect, STJ-13 was actually STJ-15 VI-STJ-13 Round Bay B Turbidity Applicable WQS attained; original basis for listing was incorrect Incorrect, STJ-13 was actually STJ-15 VI-STJ-19 Great Lameshur Bay B pH 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment 2020 USVI Integrated Report Appendix B: Combinations removed from the previous 303(d) list AU ID AU Name Class Impairment Years impaired Delist Justification Notes VI-STJ-19 Great Lameshur Bay B Phosphorus 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STJ-25 Rendezvous Bay B Turbidity 2010, 2012, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STJ-28 Great Cruz Bay B Enterococcus 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STJ-28 Great Cruz Bay B pH 2010, 2012, 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STJ-30 Cruz Bay B pH 2012, 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STJ-30 Cruz Bay B Phosphorus 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-07 Dorothea B Dissolved oxygen 2010, 2012 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-07 Dorothea B Turbidity 2010, 2012, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-08 Hull Bay B pH 2010, 2012, 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment 2020 USVI Integrated Report Appendix B: Combinations removed from the previous 303(d) list AU ID AU Name Class Impairment Years impaired Delist Justification Notes VI-STT-10 Magen's Bay B pH 2010, 2012, 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-13 Mandahl Bay (Marina) B pH 2010, 2012, 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-18 Water Bay B pH 2010, 2012, 2014 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-19 Smith Bay B Turbidity 2010, 2012, 2014, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-21 St. John Bay B Enterococcus 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-21 St. John Bay B Turbidity 2010, 2012, 2014, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-24 Red Hook Bay B Enterococcus 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-24 Red Hook Bay B Turbidity 2010, 2012, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-25 Great Bay B Turbidity 2010, 2012, 2014, 2016, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment 2020 USVI Integrated Report Appendix B: Combinations removed from the previous 303(d) list AU ID AU Name Class Impairment Years impaired Delist Justification Notes VI-STT-28 Cowpet Bay B Turbidity 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-31 Nazareth Bay B Turbidity 2010, 2012, 2014, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-35 Mangrove Lagoon B Temperature 2010, 2012, 2014, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-39 Morningstar Bay B Enterococcus 2010, 2012, 2018 TMDL Approved or established by EPA (4a) Existing TMDL. Incorrectly kept on 303(d) list. VI-STT-40 Pacquereau Bay B Turbidity 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-45 Gregerie Channel B Enterococcus 2018 TMDL Approved or established by EPA (4a) Existing TMDL. Incorrectly kept on 303(d) list. VI-STT-45 Gregerie Channel B Turbidity 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-46 Sprat Bay B Enterococcus 2018 TMDL Approved or established by EPA (4a) Existing TMDL. Incorrectly kept on 303(d) list. VI-STT-47 Hassel Island at Haulover Cut to Regis Point C Turbidity 2010, 2014, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-49 Druif Bay B Enterococcus 2018 TMDL Approved or established by EPA (4a) Existing TMDL. Incorrectly kept on 303(d) list. 2020 USVI Integrated Report Appendix B: Combinations removed from the previous 303(d) list AU ID AU Name Class Impairment Years impaired Delist Justification Notes VI-STT-49 Druif Bay B Turbidity Prior to 2010, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-50 Flamingo Bay B Enterococcus 2018 TMDL Approved or established by EPA (4a) Existing TMDL. Incorrectly kept on 303(d) list. VI-STT-50 Flamingo Bay B Turbidity 2010, 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-53 Cyril E. King Airport Subwatershed, Offshore B Dissolved oxygen Prior to 2010 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-53 Cyril E. King Airport Subwatershed, Offshore B Turbidity 2016 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment VI-STT-55 Brewers Bay B Turbidity 2010, 2012, 2014, 2016, 2018 Applicable WQS attained; reason for recovery unspecified No exceedances since 2016; all current data shows WQS attainment 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STC-01 Frederiksted, south B 0.0451 N/A N/A Low VI-STC-02 Frederiksted Harbor C 0.035 N/A N/A Low VI-STC-03 Lagrange subwatershed, offshore B 0.375 N/A N/A Low VI-STC-04 Prosperity, nearshore B 0.1118 N/A N/A Low VI-STC-05 Prosperity subwatershed, offshore B 0.5129 N/A N/A Low VI-STC-06 Sprat Hall Beach B 0.0609 N/A N/A Low VI-STC-07 Creque Dam/Butler Bay B 0.529 N/A N/A Low VI-STC-08 Hams Bay B 0.3144 N/A N/A Low VI-STC-09 Davis Bay B 0.0522 N/A N/A Low VI-STC-10 Hams Bluff B 0.5506 N/A N/A Low VI-STC-11 Northwest St. Croix HUC14, offshore B 33.302 N/A N/A Low VI-STC-12 Cane Bay B 0.0613 N/A N/A Low VI-STC-13 Baron Bluff subwatershed B 0.3498 N/A N/A Low VI-STC-14 Belvedere B 0.0557 N/A N/A Low VI-STC-15 Northside subwatershed B 0.6109 N/A N/A Low VI-STC-16 Salt River Lagoon, Marina B 0.0194 Salt River Bay National Historic Park and Ecological Preserve High VI-STC-17 Salt River Lagoon, Sugar Bay B 0.3244 Salt River Bay National Historic Park and Ecological Preserve Medium VI-STC-18 Salt River Bay B 0.3229 Salt River Bay National Historic Park and Ecological Preserve High VI-STC-19 Judith Fancy B 0.01 N/A N/A Low VI-STC-20 Salt River Bay subwatershed, west B 0.2433 Salt River Bay National Historic Park and Ecological Preserve Medium 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STC-21 Salt River Bay subwatershed, east B 0.8922 Salt River Bay National Historic Park and Ecological Preserve Medium VI-STC-22 Northcentral St. Croix HUC14, offshore B 23.61 Salt River Bay National Historic Park and Ecological Preserve Medium VI-STC-23 St. Croix-By-the- Sea B 0.0727 N/A N/A Low VI-STC-24 Long Reef Backreef, west C 0.1153 N/A N/A Low VI-STC-25 Princess subwatershed, offshore B 0.4343 N/A N/A Low VI-STC-26 Christiansted Harbor C 0.9601 N/A N/A Low VI-STC-27 Long Reef Forereef, east B 0.3149 N/A N/A Low VI-STC-28 Altona Lagoon B 0.2337 N/A N/A Low VI-STC-29 Christiansted Harbor, east C 0.1089 N/A N/A Low VI-STC-30 Beauregard Bay B 0.2145 N/A N/A Low VI-STC-31 Buccaneer Beach B 0.0166 N/A N/A Low VI-STC-32 Altona Lagoon subwatershed, offshore B 0.6812 N/A N/A Low VI-STC-33 Punnett Bay B 0.0576 N/A N/A High VI-STC-34 Punnett Point, east B 0.0223 N/A N/A Low VI-STC-35 Tamarind Reef Lagoon (Southgate Lagoon) B 0.0205 St. Croix East End Marine Park High VI-STC-36 Green Cay Beach B 0.1017 Southgate Marine Protected Area High VI-STC-37 Southgate subwatershed, offshore B 2.2219 Green Cay National Wildlife Refuge High VI-STC-38 Solitude Backreef B 0.9681 St. Croix East End Marine Park High VI-STC-39 Teague Bay B 0.1773 St. Croix East End Marine Park High VI-STC-40 Teague Bay Backreef B 0.8547 St. Croix East End Marine Park High VI-STC-41 Buck Island Backreef A 0.7675 Buck Island Reef National Monument Medium 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STC-42 Buck Island Forereef A 3.3497 Buck Island Reef National Monument Medium VI-STC-43 Solitude and Teague Bay subwatersheds, offshore B 18.822 Buck Island Reef National Monument Medium VI-STC-44 Northeast St. Croix HUC14, offshore. B 36.088 Buck Island Reef National Monument Medium VI-STC-45 Isaac Bay B 0.0853 St. Croix East End Marine Park High VI-STC-46 Grapetree Bay B 0.0425 St. Croix East End Marine Park High VI-STC-47 Turner Hole Backreef B 0.2772 St. Croix East End Marine Park High VI-STC-48 Turner Hole subwatershed, offshore B 16.949 St. Croix East End Marine Park High VI-STC-49 Madam Carty Backreef B 0.464 St. Croix East End Marine Park High VI-STC-50 Madam Carty, offshore B 3.5161 St. Croix East End Marine Park High VI-STC-51 Great Pond B 0.1578 East End Recreation Management Area Medium VI-STC-52 Great Pond Bay B 1.0184 St. Croix East End Marine Park High VI-STC-53 Great Pond Bay subwatershed, offshore B 3.0288 St. Croix East End Marine Park High VI-STC-54 Leprey Valley Backreef B 0.3712 St. Croix East End Marine Park High VI-STC-55 Leprey Valley subwatershed, offshore B 2.8455 St. Croix East End Marine Park High VI-STC-56 Bugby Hole Backreef B 0.7042 N/A N/A Low VI-STC-57 Bugby Hole subwatershed, offshore B 3.9 N/A N/A Low VI-STC-58 Southeast St. Croix HUC14, offshore B 24.146 St. Croix East End Marine Park High VI-STC-59 Canegarden Bay B 0.8542 N/A N/A Low VI-STC-60 Canegarden Bay, offshore B 0.7933 N/A N/A Low 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STC-61 Hess Oil Virgin Islands Harbor C 0.671 N/A N/A Low VI-STC-62 Limetree Bay B 0.7239 N/A N/A Low VI-STC-63 Martin-Marietta Alumina Harbor C 0.3228 N/A N/A Low VI-STC-64 Manning Bay/Estate Anguilla Beach B 0.0508 N/A N/A Low VI-STC-65 Hovensa, west B 1.2865 N/A N/A Low VI-STC-66 Hovensa subwatershed, offshore B 2.8305 N/A N/A Low VI-STC-67 Southports St. Croix HUC14, offshore B 8.1966 N/A N/A Low VI-STC-68 Bethlehem subwatershed, inshore B 0.2149 N/A N/A Low VI-STC-69 Bethlehem subwatershed, offshore B 0.3971 N/A N/A Low VI-STC-70 Airport, nearshore B 2.1943 N/A N/A Low VI-STC-71 Airport, offshore B 4.263 N/A N/A Low VI-STC-72 Airport St. Croix HUC14, offshore B 4.1803 N/A N/A Low VI-STC-73 Diamond, nearshore B 0.1699 N/A N/A Low VI-STC-74 Enfield Green Beach/VIRIL Outfall B 0.1376 N/A N/A Low VI-STC-75 Diamond subwatershed, offshore B 2.8479 N/A N/A Low VI-STC-76 Carlton Beach B 0.2447 N/A N/A Low VI-STC-77 Long Point Bay B 0.8376 N/A N/A Low VI-STC-78 Long Point Bay subwatershed, offshore B 4.9231 N/A N/A Low VI-STC-79 Good Hope Beach B 0.1876 N/A N/A Low VI-STC-80 Sandy Point, nearshore south B 2.0121 Sandy Point National Wildlife Refuge Medium VI-STC-81 Sandy Point, offshore south B 7.4306 N/A N/A Low VI-STC-82 Sandy Point, nearshore west B 0.1158 Sandy Point National Wildlife Refuge Medium 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STC-83 Sandy Point, offshore west B 0.4875 Sandy Point National Wildlife Refuge Medium VI-STC-84 Southwest St. Croix HUC14, offshore B 18.347 N/A N/A Low VI-STJ-01 Caneel Bay B 0.2623 Virgin Islands National Park Medium VI-STJ-02 Hawksnest Bay B 0.2246 Virgin Islands National Park Medium VI-STJ-03 Trunk Bay A 0.0685 Virgin Islands National Park Medium VI-STJ-04 Hawksnest Bay subwatershed, offshore B 1.7287 Virgin Islands National Park Medium VI-STJ-05 Cinnamon Bay B 0.1456 Virgin Islands National Park Medium VI-STJ-06 Maho Bay/Francis Bay B 0.346 Virgin Islands National Park Medium VI-STJ-07 Maho Bay subwatershed, offshore B 1.6071 Virgin Islands National Park Medium VI-STJ-08 Mary Point B 0.4831 Virgin Islands National Park Medium VI-STJ-09 Leinster Bay B 0.6627 Virgin Islands National Park Medium VI-STJ-10 Minnebeck Bay B 1.4876 Virgin Islands National Park Medium VI-STJ-11 Newfound Bay B 0.0765 N/A N/A Low VI-STJ-12 North St. John HUC14, offshore B 23.719 Carval Rock Marine Protected Area Medium VI-STJ-13 Round Bay B 0.6965 Virgin Islands National Park High VI-STJ-14 Hurricane Hole B 0.7689 Virgin Islands National Park Medium VI-STJ-15 Coral Harbor B 0.6015 Virgin Islands National Park High VI-STJ-16 Coral Bay B 2.2337 Virgin Islands National Park Medium VI-STJ-17 Salt Pond Bay B 0.1978 Virgin Islands National Park Medium VI-STJ-18 Grootman Bay B 0.1046 Virgin Islands National Park Medium VI-STJ-19 Great Lameshur Bay B 0.359 Virgin Islands National Park Medium VI-STJ-20 Southeast St. John HUC14, offshore B 24.319 Booby Rock Marine Protected Area Medium VI-STJ-21 Genti Bay, nearshore B 0.0947 Virgin Islands National Park Medium 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STJ-22 Genti Bay, offshore B 0.769 Virgin Islands National Park Medium VI-STJ-23 Fish Bay B 0.2103 Virgin Islands National Park High VI-STJ-24 Fish Bay subwatershed, offshore B 0.1824 Virgin Islands National Park Medium VI-STJ-25 Rendezvous Bay B 0.4677 N/A N/A Low VI-STJ-26 Chocolate Hole B 0.1004 N/A N/A Low VI-STJ-27 Rendezvous Bay subwatershed, offshore B 0.1863 N/A N/A Low VI-STJ-28 Great Cruz Bay B 0.1396 N/A N/A Low VI-STJ-29 Turner Bay/Enighed Pond B 0.057 N/A N/A Low VI-STJ-30 Cruz Bay B 0.0674 Virgin Islands National Park Medium VI-STJ-31 Great Cruz Bay watershed, offshore B 0.5775 Virgin Islands National Park Medium VI-STJ-32 Southwest St. John HUC14, offshore B 10.142 Virgin Islands National Park Medium VI-STJ-33 Pillsbury Sound B 6.9399 Steven Cay Marine Protected Area Medium VI-STT-01 Botany Bay B 0.1576 N/A N/A Low VI-STT-02 Stumpy Bay B 0.0597 N/A N/A Low VI-STT-03 Botany Bay subwatershed, offshore B 1.309 N/A N/A Low VI-STT-04 Santa Maria Bay B 0.3617 N/A N/A Low VI-STT-05 Caret Bay B 0.0266 N/A N/A Low VI-STT-06 Neltjeberg Bay B 0.0562 N/A N/A Low VI-STT-07 Dorothea B 0.0254 N/A N/A Low VI-STT-08 Hull Bay B 0.2049 N/A N/A Low VI-STT-09 Dorothea Bay subwatershed, offshore B 0.7673 N/A N/A Low 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STT-10 Magens Bay B 1.6208 Magen's Bay Local Conservation Area Medium VI-STT-11 Northwest St. Thomas HUC14, offshore B 55.088 Cockroach Cay Marine Protected Area Medium VI-STT-12 Lovenlund Bay B 0.0228 N/A N/A Low VI-STT-13 Mandahl Bay (Marina) B 0.0131 N/A N/A Low VI-STT-14 Tutu Bay B 0.0414 N/A N/A Low VI-STT-15 Sunsi Bay B 0.0152 N/A N/A Low VI-STT-16 Spring Bay B 0.0102 N/A N/A Low VI-STT-17 Mandahl Bay subwatershed, offshore B 1.1379 N/A N/A Low VI-STT-18 Water Bay B 0.0845 N/A N/A Low VI-STT-19 Smith Bay B 0.1187 Smith Bay Local Park Medium VI-STT-20 Smith Bay subwatershed, offshore B 0.4103 N/A N/A Low VI-STT-21 St. John Bay B 0.0411 N/A N/A Low VI-STT-22 Red Bay B 0.0078 N/A N/A Low VI-STT-23 Vessup Bay B 0.0619 N/A N/A Low VI-STT-24 Red Hook Bay B 0.1772 N/A N/A Low VI-STT-25 Great Bay B 0.5593 St. Thomas East End Reserves High VI-STT-26 Red Hook Bay, offshore B 0.4725 Shark Island Marine Protected Area Medium VI-STT-27 St. James Islands, offshore B 0.6691 Dog Island Marine Protected Area Medium VI-STT-28 Cowpet Bay B 0.0757 St. Thomas East End Reserves High VI-STT-29 St. James Bay B 1.2439 Dog Island Marine Protected Area Medium VI-STT- 30A Northeast St. Thomas HUC14, offshore north B 42.927 N/A N/A Low 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STT- 30B Northeast St. Thomas HUC14, offshore south B 24.908 Dog Island Marine Protected Area Medium VI-STT-31 Nazareth Bay B 0.1793 St. Thomas East End Reserves High VI-STT-32 Jersey Bay, offshore B 1.2925 Cas Cay National Conservation Area High VI-STT-33 Benner Bay B 0.4187 Cas Cay National Conservation Area Medium VI-STT-34 Benner Bay Lagoon Marina B 0.0355 Compass Point Marine Protected Area High VI-STT-35 Mangrove Lagoon B 0.2931 St. Thomas East End Reserves High VI-STT-36 Frenchman Bay subwatershed, east B 0.3532 St. Thomas East End Reserves High VI-STT-37 Frenchman Bay B 0.0195 N/A N/A Low VI-STT-38 Limetree Bay B 0.0065 N/A N/A Low VI-STT-39 Morningstar Bay B 0.0215 N/A N/A Low VI-STT-40 Pacquereau Bay B 0.0453 N/A N/A Low VI-STT-41 Frenchman Bay subwatershed, offshore B 2.9233 St. Thomas East End Reserves High VI-STT-42 Southeast St. Thomas HUC14, offshore B 50.939 Buck Island National Wildlife Refuge Medium VI-STT-43 St. Thomas Harbor, inner C 0.7495 Virgin Islands National Park Medium VI-STT-44 St. Thomas Harbor, outer B 1.2128 Virgin Islands National Park Medium VI-STT-45 Gregerie Channel B 1.7072 Virgin Islands National Park Medium VI-STT-46 Sprat Bay B 0.3814 N/A N/A Low VI-STT-47 Hassel Island at Haulover Cut to Regis Point C 0.2074 N/A N/A Low VI-STT-48 Water Isle Hotel, Beach B 0.0057 N/A N/A Low 2020 USVI Integrated Report Appendix C: Assessment Unit Priority Based on World Protected Areas AU ID AU Name Class Size (sq. mi.) Name Designation Priority VI-STT-49 Druif Bay B 0.0331 N/A N/A Low VI-STT-50 Flamingo B 0.061 N/A N/A Low VI-STT-51 Krum Bay C 0.0754 N/A N/A Low VI-STT-52 Lindbergh Bay B 0.2612 N/A N/A Low VI-STT-53 Cyril E. King Airport subwatershed, offshore B 0.8499 N/A N/A Low VI-STT-54 Perseverance Bay, offshore B 0.4734 N/A N/A Low VI-STT-55 Brewers Bay B 0.1076 N/A N/A Low VI-STT-56 Perseverance Bay B 0.2114 N/A N/A Low VI-STT-57 Fortuna Bay B 0.0827 N/A N/A Low VI-STT-58 Fortuna Bay subwatershed, offshore B 0.6553 N/A N/A Low VI-STT-59 Northwest St. Thomas HUC14, offshore B 77.71 Flat Cay Marine Protected Area Medium 2020 USVI Integrated Report Figure 6: St. Croix Assessment Units Intersected with Marine Protected Areas in blue 2020 USVI Integrated Report Figure 7: St. John & St. Thomas Assessment Units Intersected with Marine Protected Areas in blue