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Data are also available for these years:  2002  2004  2006

303(d) Listed Waters for 2008

Waterbody Changes from Prior Cycle

Comparison Summary by Reporting Year

For More Information:

Virgin Islands Assessment Report Exit EPA Disclaimer
State Water Quality Program Exit EPA Disclaimer

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Download GIS Information

Virgin Islands 2008 Water Quality Assessment Report

Assessed Waters of Virgin Islands by Watershed

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Display impaired waters and TMDL information only

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Virgin Islands Assessment Summary for Reporting Year 2008

Description of this table
  Size of Water
Ocean and
Near Coastal
(Square Miles)
   Good Waters 373.8
      Previously impaired waters
      now attaining all uses		 2.2
   Threatened Waters
      TMDL completed    
      TMDL alternative    
      Non-pollutant impairment    
      TMDL needed    
   Impaired Waters 28.6
      TMDL completed    
      TMDL alternative    
      Non-pollutant impairment    
      TMDL needed     28.6
         New TMDLs completed     .0
         Remaining TMDLs needed           28.6
Total Assessed Waters 402.4
Total Waters Unavailable
Percent of Waters Assessed Unavailable

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2008


Virgin Islands Assessed Waters
Summary of Water Quality Attainment for Ocean and Near Coastal
Reporting Year 2008

Description of this table
Pie chart not displayed because total size for Ocean and Near Coastal is unavailable.
Assessed Status Square Miles
Assessed 402.4
Unassessed Unavailable
Total Square Miles Unavailable







arrow pointing right 		Description of this table
Attainment Status Square Miles
Good 373.8
Threatened .0
Impaired 28.6
Total Square Miles Assessed 402.4







arrow pointing right 		Description of this table
TMDL Development Status Square Miles
All TMDLs completed .0
TMDL alternative .0
Non-pollutant impairment .0
TMDL needed 28.6
Total Threatened and Impaired 28.6

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Virgin Islands Assessed Waters
Designated Use Support for Ocean and Near Coastal
Reporting Year 2008*

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table
Designated Use Square Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Aquatic Life Use 402.3 93.1 .0 6.9 color.gifcolor.gif
Primary Contact Recreation 401.5 95.6 .0 4.3 color.gifcolor.gifcolor.gif

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Virgin Islands Causes of Impairment
for Threatened and Impaired Ocean and Near Coastal
Reporting Year 2008

Description of this table
Cause of Impairment Cause of Impairment Group Square Miles
Threatened or
Impaired
Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 20.2
Turbidity Turbidity color.gif 12.3
Fecal Coliform Pathogens color.gif 11.3
Phosphorus, Total Nutrients color.gif 7.8
Enterococcus Bacteria Pathogens color.gif 7.1
pH pH/Acidity/Caustic Conditions color.gif 6.8
Secchi Disk Transparency Turbidity color.gif 3.2
Ambient Bioassays -- Acute Aquatic Toxicity Total Toxics color.gif 2.8
Ambient Bioassays - Chronic Aquatic Toxicity Total Toxics color.gif 2.8
Temperature, Water Temperature color.gif 1.0

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Virgin Islands Probable Sources of Impairments
for Threatened and Impaired Ocean and Near Coastal
Reporting Year 2008

Description of this table
Probable Source Probable Source Group Square Miles
Threatened or
Impaired
Source Unknown Unknown color.gif 12.0
Marina Boat Maintenance Recreational Boating And Marinas color.gif 4.9
Non-Point Source Unspecified Nonpoint Source color.gif 4.2
Other Marina/Boating On-Vessel Discharges Recreational Boating And Marinas color.gif 3.8
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems) Municipal Dishcarges/Sewage color.gif 3.7
Marina/Boating Sanitary On-Vessel Discharges Recreational Boating And Marinas color.gif 3.6
Highways, Roads, Bridges, Infrastructure (New Construction) Construction color.gif 3.4
Other Recreational Pollution Sources Recreation And Tourism (Non-Boating) color.gif 3.3
Industrial Point Source Discharge Industrial color.gif 3.1
Municipal Point Source Discharges Municipal Dishcarges/Sewage color.gif 3.0
Highway/Road/Bridge Runoff (Non-Construction Related) Urban-Related Runoff/Stormwater color.gif 2.4
Changes In Tidal Circulation/Flushing Hydromodification color.gif 2.0
Marina/Boating Pumpout Releases Recreational Boating And Marinas color.gif 1.7
Illegal Dumping Spills/Dumping color.gif 1.3
Discharges From Municipal Separate Storm Sewer Systems (Ms4) Urban-Related Runoff/Stormwater color.gif 1.3
Post-Development Erosion And Sedimentation Hydromodification color.gif 1.3
Other Spill Related Impacts Spills/Dumping color.gif 1.2
Agriculture Agriculture color.gif 1.1
Impacts From Resort Areas (Winter And Non-Winter Resorts) Recreation And Tourism (Non-Boating) color.gif 1.0
Accidental Release/Spill Spills/Dumping color.gif 1.0
Marina Boat Construction Recreational Boating And Marinas color.gif 1.0
Ballast Water Releases Commercial Harbor And Port Activities color.gif .9
Combined Sewer Overflows Municipal Dishcarges/Sewage color.gif .6
Residential Districts Urban-Related Runoff/Stormwater color.gif .5
Wastes From Pets Urban-Related Runoff/Stormwater color.gif .2
Dredging (E.G., For Navigation Channels) Hydromodification color.gif .2
Commercial Ferries Commercial Harbor And Port Activities color.gif .1
Marina Fueling Operations Recreational Boating And Marinas color.gif .1
Municipal Point Source Impacts From Inadequate Industrial/Commercial Pretreatment Municipal Dishcarges/Sewage color.gif .1
Erosion From Derelict Land (Barren Land) Hydromodification color.gif .0
Sanitary Sewer Overflows (Collection System Failures) Municipal Dishcarges/Sewage color.gif .0

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Virgin Islands Causes of Impairment for Reporting Year 2008


Description of this table
NOTE: Click on the underlined Cause of Impairment Group to see a list of specific state causes of impairment making up the Cause of Impairment Group.
Cause of Impairment Group Size of Assessed Waters with Listed Causes of Impairment
Ocean and
Near Coastal
(Square Miles)
Nutrients 7.8
Organic Enrichment/Oxygen Depletion 20.2
Pathogens 15.1
pH/Acidity/Caustic Conditions 6.8
Temperature 1.0
Total Toxics 2.8
Turbidity 12.6

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Virgin Islands Probable Sources Contributing to Impairments
for Reporting Year 2008

Description of this table
NOTE: Click on the underlined Probable Source Group to see a list of specific state Probable Sources making up the Probable Source Group.
Probable Source Group Size of Assessed Waters with Probable Sources of Impairments
Ocean and
Near Coastal
(Square Miles)
Agriculture 1.1
Commercial Harbor And Port Activities 1.0
Construction 3.4
Hydromodification 3.4
Industrial 3.1
Municipal Dishcarges/Sewage 6.7
Recreation And Tourism (Non-Boating) 4.3
Recreational Boating And Marinas 8.2
Spills/Dumping 2.5
Unknown 12.0
Unspecified Nonpoint Source 4.2
Urban-Related Runoff/Stormwater 4.2

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Virgin Islands TMDL Alternatives by Cause of Impairment 2008


No TMDL Alternatives reported.

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Virgin Islands Previously Impaired Waters Now Attaining All Uses


No previously impaired waters reported as attaining all uses.

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Virgin Islands Causes of Impairment for 303(d) Listed Waters

Description of this table
NOTE: Click on a cause of impairment (e.g. pathogens) to see the specific state-reported causes that are grouped to make up this category. Click on the "Number of Causes of Impairment Reported" to see a list of waters with that cause of impairment.
Cause of Impairment Group Name Number of Causes of Impairment Reported
Organic Enrichment/Oxygen Depletion color.gif 56
Turbidity color.gif 37
Pathogens color.gif 26
pH/Acidity/Caustic Conditions color.gif 24
Nutrients color.gif 8
Temperature color.gif 3
Total Toxics color.gif 2

Total: 156 Causes of Impairment

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Virgin Islands Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995.

Description of this table
NOTE: Click on the underlined "Pollutant" value to see associated listed waters for which a TMDL was developed. Click on the underlined "Number of TMDLs" value to see a listing of those TMDLs for the pollutant.
Pollutant Number of TMDLs Number of Causes of
Impairment Addressed
Biochemical Oxygen Demand (BOD) color.gif 8 8
Fecal Coliform color.gif 7 7
Dissolved Oxygen color.gif 5 5
Oil and Grease color.gif 3 4
Sediment Oxygen Demand color.gif 3 3
Enterococcus Bacteria color.gif 1 1
Phosphorus color.gif 1 1
Total Suspended Solids (TSS) color.gif 1 1

Total: 29 TMDLs; 30 Causes of Impairment Addressed


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Virgin Islands Cumulative Number of TMDLs

EPA Fiscal Year starts October 1 and ends September 30.


Description of this table
NOTE: Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year.
Fiscal Year Number of TMDLs Number of Causes of
Impairment Addressed
2003 color.gif 3 3
2004 color.gif 3 3
2005 color.gif 10 11
2006 color.gif 1 1
2007 color.gif 12 12

Total: 29 TMDLs; 30 Causes of Impairment Addressed

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TMDL Document Search


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