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Assessment Data for the State of Virginia Year 2004

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The 2004 National Assessment
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Total Assessed Waters for the State of Virginia

 Description of this table

Size Of Water
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Water (Square Miles) Inland Lake Shoreline (Miles)
Total Assessed Waters 13,205.28 108,742.14 2,532.31 .00 .00 .00 .00 .00 .00
Estimated Total Water Size in VA 50,414.89 149,982.00 2,500.00 Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable
Percent of Waters Assessed 26.19 72.50 101.29 Unavailable Unavailable Unavailable Unavailable Unavailable Unavailable

Assessed Waters of Virginia by Watershed (8 Digit USGS Cataloging Unit)

 Description of this table
Watershed Size of Water
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Water (Square Miles) Inland Lake Shoreline (Miles)
8-digit HUC Name Not Reported 43.24 114.07 782.71 .00 .00 .00 .00 .00 .00
ALBEMARLE 201.44 3,418.90 84.85 .00 .00 .00 .00 .00 .00
APPOMATTOX 537.47 5,846.00 2.68 .00 .00 .00 .00 .00 .00
BANISTER 103.16 524.37 .00 .00 .00 .00 .00 .00 .00
BLACKWATER 664.66 105.00 .00 .00 .00 .00 .00 .00 .00
CHINCOTEAGUE 17.54 .00 46.90 .00 .00 .00 .00 .00 .00
CONOCOCHEAGUE-OPEQUON 197.76 .00 .00 .00 .00 .00 .00 .00 .00
EASTERN LOWER DELMARVA 151.63 .00 108.26 .00 .00 .00 .00 .00 .00
GHOWAN 98.37 .00 .00 .00 .00 .00 .00 .00 .00
GREAT WICOMICO-PIANKATANK 67.27 .00 659.56 .00 .00 .00 .00 .00 .00
HAMPTON ROADS 138.15 4,449.80 68.22 .00 .00 .00 .00 .00 .00
LOWER DAN 154.40 1,624.93 .00 .00 .00 .00 .00 .00 .00
LOWER JAMES 979.73 4,704.93 205.54 .00 .00 .00 .00 .00 .00
LOWER POTOMAC 114.15 91.00 43.14 .00 .00 .00 .00 .00 .00
LOWER RAPPAHANNOCK 189.63 .00 161.00 .00 .00 .00 .00 .00 .00
LYNNHAVEN-POQUOSON 242.82 5,401.40 588.22 .00 .00 .00 .00 .00 .00
MATTAPONI 156.80 .00 6.87 .00 .00 .00 .00 .00 .00
MAURY 296.36 31.00 .00 .00 .00 .00 .00 .00 .00
MEHERIIN 358.02 515.00 .00 .00 .00 .00 .00 .00 .00
MIDDLE JAMES-BUFFALO 533.64 275.56 .00 .00 .00 .00 .00 .00 .00
MIDDLE JAMES-WILLIS 316.44 .00 .00 .00 .00 .00 .00 .00 .00
MIDDLE NEW 291.21 .00 .00 .00 .00 .00 .00 .00 .00
MIDDLE POTOMAC-ANACOSTIA-OCCOQUAN 197.10 1,700.00 16.43 .00 .00 .00 .00 .00 .00
MIDDLE POTOMAC-CATOCTIN 156.27 .00 .00 .00 .00 .00 .00 .00 .00
MIDDLE ROANOKE 223.47 31,693.75 .00 .00 .00 .00 .00 .00 .00
NORTH FORK HOLSTON 148.78 90.00 .00 .00 .00 .00 .00 .00 .00
NORTH FORK SHENANDOAH 456.72 .00 .00 .00 .00 .00 .00 .00 .00
NOTTOWAY 951.42 251.72 .00 .00 .00 .00 .00 .00 .00
PAMUNKEY 332.28 5,540.00 10.65 .00 .00 .00 .00 .00 .00
POCOMOKE 44.29 .00 2.60 .00 .00 .00 .00 .00 .00
POWELL 148.71 206.00 .00 .00 .00 .00 .00 .00 .00
RAPIDAN-UPPER RAPPAHANNOCK 330.58 328.00 .00 .00 .00 .00 .00 .00 .00
RIVANNA 312.10 141.00 .00 .00 .00 .00 .00 .00 .00
ROANOKE RAPIDS 53.15 4,465.19 .00 .00 .00 .00 .00 .00 .00
SHENANDOAH 106.55 120.00 .00 .00 .00 .00 .00 .00 .00
SOUTH BRANCH POTOMAC 28.21 .00 .00 .00 .00 .00 .00 .00 .00
SOUTH FORK HOLSTON 208.03 1,918.00 .00 .00 .00 .00 .00 .00 .00
SOUTH FORK SHENANDOAH 812.03 112.30 .00 .00 .00 .00 .00 .00 .00
TUG 40.23 .00 .00 .00 .00 .00 .00 .00 .00
UPPER CLINCH 339.87 30.00 .00 .00 .00 .00 .00 .00 .00
UPPER DAN 263.23 2,515.00 .00 .00 .00 .00 .00 .00 .00
UPPER JAMES 725.39 2,373.26 .00 .00 .00 .00 .00 .00 .00
UPPER LEVISA 194.64 1,297.00 .00 .00 .00 .00 .00 .00 .00
UPPER NEW 476.22 4,540.83 .00 .00 .00 .00 .00 .00 .00
UPPER ROANOKE 704.58 23,535.23 .00 .00 .00 .00 .00 .00 .00
UPPER YADKIN 9.21 .00 .00 .00 .00 .00 .00 .00 .00
WESTERN LOWER DELMARVA 213.76 .00 48.50 .00 .00 .00 .00 .00 .00
YORK 174.13 828.60 89.62 .00 .00 .00 .00 .00 .00

Virginia Assessed Waters
Individual Use Support for Rivers and Streams

 Description of this table
State Designated Use Total Miles Assessed Percent Good Percent Threatened Percent Impaired color.gif% Good
color.gif% Threatened
color.gif% Impaired
AQUATIC LIFE 12,307.14 74.39 .00 25.61 color.gifcolor.gif
FISH CONSUMPTION 4,780.93 85.69 .00 14.31 color.gifcolor.gif
PUBLIC WATER SUPPLY 1,430.27 98.79 .00 1.21 color.gifcolor.gif
RECREATION 9,943.30 49.64 .00 50.36 color.gifcolor.gif
WILDLIFE 9,989.65 99.94 .00 .06 color.gifcolor.gif
The state assessed 13,205.28 miles of rivers and streams, or 26.19% of 50,414.89 total miles.

Virginia Assessed Waters
Water Quality Attainment for Rivers and Streams

 Description of this table
Attainment Status Miles Percent of Assessed
Good 6,299.46 47.70
Threatened .00 .00
Impaired 6,905.82 52.30
Total Miles Assessed 13,205.28 100.00

Virginia Top Causes of Impairments
for Rivers and Streams

 Description of this table
# State Cause Name Total
Miles
Impaired
1 FECAL COLIFORM 4,826.12
2 PH 1,358.88
3 OXYGEN, DISSOLVED 1,181.22
4 BENTHIC-MACROINVERTEBRATE BIOASSESSMENTS (STREAMS) 1,176.81
5 BACTERIA, ESCHERICHIA COLI 587.95
6 POLYCHLORINATED BIPHENYLS 421.26
7 TEMPERATURE, WATER 275.98
8 MERCURY 263.80
9 CHLORIDE 32.58
10 DDE 19.35

Virginia Top Probable Sources of Impairments
for Rivers and Streams

 Description of this table
# State Source Name Total Miles Impaired by Source
1 SOURCE UNKNOWN 3,262.85
2 WILDLIFE OTHER THAN WATERFOWL 1,616.53
3 NON-POINT SOURCE 1,595.87
4 NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED 1,520.75
5 MUNICIPAL (URBANIZED HIGH DENSITY AREA) 595.64
6 AGRICULTURE 489.32
7 GRAZING IN RIPARIAN OR SHORELINE ZONES 206.43
8 ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENCENTRALIZED SYSTEMS) 175.41
9 ATMOSPHERIC DEPOSITON - ACIDITY 165.55
10 ANIMAL FEEDING OPERATIONS (NPS) 140.53

Virginia Assessed Waters
Individual Use Support for Lakes, Ponds and Reservoirs

 Description of this table
State Designated Use Total Acres Assessed Percent Good Percent Threatened Percent Impaired color.gif% Good
color.gif% Threatened
color.gif% Impaired
AQUATIC LIFE 108,064.91 21.03 .00 78.97 color.gifcolor.gif
FISH CONSUMPTION 79,998.13 42.62 .00 57.38 color.gifcolor.gif
PUBLIC WATER SUPPLY 86,630.26 99.87 .00 .13 color.gifcolor.gif
RECREATION 103,055.70 97.39 .00 2.61 color.gifcolor.gif
WILDLIFE 103,558.97 99.49 .00 .51 color.gifcolor.gif
The state assessed 108,742.14 acres of lakes, ponds and reservoirs, or 72.50% of 149,982.00 total acres.

Virginia Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs

 Description of this table
Attainment Status Acres Percent of Assessed
Good 19,154.44 17.61
Threatened .00 .00
Impaired 89,587.70 82.39
Total Acres Assessed 108,742.14 100.00

Virginia Top Causes of Impairments
for Lakes, Ponds and Reservoirs

 Description of this table
# State Cause Name Total
Acres
Impaired
1 OXYGEN, DISSOLVED 85,097.54
2 POLYCHLORINATED BIPHENYLS 45,904.78
3 PH 11,267.36
4 BACTERIA, ESCHERICHIA COLI 1,810.16
5 FECAL COLIFORM 1,066.23
6 COPPER 530.00
7 NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS 110.00

Virginia Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs

 Description of this table
# State Source Name Total Acres Impaired by Source
1 NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED 64,725.55
2 SOURCE UNKNOWN 51,738.51
3 CHANGES IN ORDINARY STRATIFICATION AND BOTTOM WATER HYPOXIA/ANOXIA 11,350.78
4 DAM OR IMPOUNDMENT 1,379.57
5 MUNICIPAL (URBANIZED HIGH DENSITY AREA) 908.00
6 WILDLIFE OTHER THAN WATERFOWL 683.00
7 AGRICULTURE 683.00
8 SANITARY SEWER OVERFLOWS (COLLECTION SYSTEM FAILURES) 378.00
9 UPSTREAM SOURCE 349.00
10 NON-POINT SOURCE 251.80

Virginia Assessed Waters
Individual Use Support for Bays and Estuaries

 Description of this table
State Designated Use Total Square Miles Assessed Percent Good Percent Threatened Percent Impaired color.gif% Good
color.gif% Threatened
color.gif% Impaired
AQUATIC LIFE 2,408.98 28.30 .00 71.70 color.gifcolor.gif
FISH CONSUMPTION 1,779.93 94.50 .00 5.50 color.gifcolor.gif
PUBLIC WATER SUPPLY 8.72 100.00 .00 .00 color.gif
RECREATION 821.33 94.33 .00 5.67 color.gifcolor.gif
SHELLFISHING 2,229.85 96.67 .00 3.33 color.gifcolor.gif
WILDLIFE 844.48 88.47 .00 11.53 color.gifcolor.gif
The state assessed 2,532.31 square miles of bays and estuaries, or 101.29% of 2,500.00 total square miles.

Virginia Assessed Waters
Water Quality Attainment for Bays and Estuaries

 Description of this table
Attainment Status Square Miles Percent of Assessed
Good 722.22 28.52
Threatened .00 .00
Impaired 1,810.09 71.48
Total Square Miles Assessed 2,532.31 100.00

Virginia Top Causes of Impairments
for Bays and Estuaries

 Description of this table
# State Cause Name Total
Square Miles
Impaired
1 OXYGEN, DISSOLVED 1,262.44
2 ESTUARINE BIOASSESSMENTS 596.19
3 NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS 274.04
4 FECAL COLIFORM 111.81
5 CHLORIDE 96.12
6 POLYCHLORINATED BIPHENYLS 96.06
7 TRIBUTYLIN TBT (TRIBUTYLSTANNE) 14.65
8 PH 7.09
9 ENTEROCOCCUS 3.09
10 BACTERIA, ESCHERICHIA COLI 2.41

Virginia Top Probable Sources of Impairments
for Bays and Estuaries

 Description of this table
# State Source Name Total Square Miles Impaired by Source
1 NON-POINT SOURCE 1,107.72
2 MUNICIPAL POINT SOURCE DISCHARGES 1,090.59
3 INDUSTRIAL POINT SOURCE DISCHARGE 1,089.82
4 ATMOSPHERIC DEPOSITON - NITROGEN 1,089.40
5 SOURCES OUTSIDE STATE JURISTICTION OR BORDERS 1,089.40
6 SOURCE UNKNOWN 372.61
7 CHANGES IN ORDINARY STRATIFICATION AND BOTTOM WATER HYPOXIA/ANOXIA 145.72
8 NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED 107.73
9 SHIPBUILDING, REPAIRS, DRYDOCKING 14.65
10 OTHER SHIPPING RELEASES (WASTES AND DETRITUS) 14.65

Virginia

Causes of Impairment

Description of this table
State Cause Name Size of Assessed Waters with Listed Causes of Impairment
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Waters (Square Miles) Inland Lake Shoreline (Miles)
ALDRIN 6.54 .00 .00 .00 .00 .00 .00 .00 .00
AMMONIA (UN-IONIZED) 1.46 .00 1.24 .00 .00 .00 .00 .00 .00
ARSENIC 2.66 .00 .00 .00 .00 .00 .00 .00 .00
BACTERIA, ESCHERICHIA COLI 587.95 1,810.16 2.41 .00 .00 .00 .00 .00 .00
BENTHIC-MACROINVERTEBRATE BIOASSESSMENTS (STREAMS) 1,176.81 .00 .00 .00 .00 .00 .00 .00 .00
BENZO[K]FLUORANTHENE 18.66 .00 .00 .00 .00 .00 .00 .00 .00
CHLORDANE .60 .00 .00 .00 .00 .00 .00 .00 .00
CHLORIDE 32.58 .00 96.12 .00 .00 .00 .00 .00 .00
COPPER 1.24 530.00 .00 .00 .00 .00 .00 .00 .00
DDE 19.35 .00 .00 .00 .00 .00 .00 .00 .00
DDT 19.35 .00 .00 .00 .00 .00 .00 .00 .00
ENTEROCOCCUS .00 .00 3.09 .00 .00 .00 .00 .00 .00
ESTUARINE BIOASSESSMENTS .00 .00 596.19 .00 .00 .00 .00 .00 .00
FECAL COLIFORM 4,826.12 1,066.23 111.81 .00 .00 .00 .00 .00 .00
IRON 6.89 .00 .00 .00 .00 .00 .00 .00 .00
LEAD 7.12 .00 .00 .00 .00 .00 .00 .00 .00
MANGANESE 6.89 .00 .00 .00 .00 .00 .00 .00 .00
MERCURY 263.80 .00 1.79 .00 .00 .00 .00 .00 .00
NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS .00 110.00 274.04 .00 .00 .00 .00 .00 .00
OXYGEN, DISSOLVED 1,181.22 85,097.54 1,262.44 .00 .00 .00 .00 .00 .00
PH 1,358.88 11,267.36 7.09 .00 .00 .00 .00 .00 .00
POLYCHLORINATED BIPHENYLS 421.26 45,904.78 96.06 .00 .00 .00 .00 .00 .00
SULFATES 10.38 .00 .00 .00 .00 .00 .00 .00 .00
TEMPERATURE, WATER 275.98 .00 .00 .00 .00 .00 .00 .00 .00
TRIBUTYLIN TBT (TRIBUTYLSTANNE) .00 .00 14.65 .00 .00 .00 .00 .00 .00

Virginia

Probable Sources Contributing to Impairment

Description of this table
State Source Name Size of Assessed Waters with Probable Sources of Impairment
Rivers, Streams, Creeks (Miles) Lakes, Ponds, Reservoir (Acres) Bays, Estuaries (Square Miles) Coastal Shorelines (Miles) Oceans, Near Coastal Waters (Square Miles) Wetlands (Acres) Great Lakes Shoreline (Miles) Great Lakes Open Waters (Square Miles) Inland Lake Shoreline (Miles)
ACID MINE DRAINAGE 36.48 .00 .00 .00 .00 .00 .00 .00 .00
AGRICULTURE 489.32 683.00 .00 .00 .00 .00 .00 .00 .00
ANIMAL FEEDING OPERATIONS (NPS) 140.53 .00 .00 .00 .00 .00 .00 .00 .00
ATMOSPHERIC DEPOSITON - ACIDITY 165.55 .00 .00 .00 .00 .00 .00 .00 .00
ATMOSPHERIC DEPOSITON - NITROGEN .00 .00 1,089.40 .00 .00 .00 .00 .00 .00
CHANGES IN ORDINARY STRATIFICATION AND BOTTOM WATER HYPOXIA/ANOXIA .00 11,350.78 145.72 .00 .00 .00 .00 .00 .00
CHANNELIZATION 3.26 .00 .00 .00 .00 .00 .00 .00 .00
COMBINED SEWER OVERFLOWS 37.93 .00 10.84 .00 .00 .00 .00 .00 .00
COMMERCIAL DISTRICTS (INDUSTRIAL PARKS) 3.40 .00 .00 .00 .00 .00 .00 .00 .00
CONTAMINATED SEDIMENTS 121.15 .00 .29 .00 .00 .00 .00 .00 .00
DAM OR IMPOUNDMENT 44.19 1,379.57 .00 .00 .00 .00 .00 .00 .00
DISCHARGES FROM MUNICIPAL SEPARATE STORM SEWER SYSTEMS (MS4) 125.19 .00 11.78 .00 .00 .00 .00 .00 .00
DROUGHT-RELATED IMPACTS .95 .00 .00 .00 .00 .00 .00 .00 .00
GRAZING IN RIPARIAN OR SHORELINE ZONES 206.43 .00 .00 .00 .00 .00 .00 .00 .00
ILLEGAL DUMPS OR OTHER INAPPROPRIATE WASTE DISPOSAL .85 .00 .00 .00 .00 .00 .00 .00 .00
ILLICIT CONNECTIONS/HOOK-UPS TO STORM SEWERS 13.87 .00 .00 .00 .00 .00 .00 .00 .00
IMPACTS FROM ABANDONED MINE LANDS (INACTIVE) 28.40 .00 .00 .00 .00 .00 .00 .00 .00
INDUSTRIAL POINT SOURCE DISCHARGE 134.12 .00 1,089.82 .00 .00 .00 .00 .00 .00
LANDFILLS 2.26 .00 .00 .00 .00 .00 .00 .00 .00
LEAKING UNDERGROUND STORAGE TANKS 1.61 .00 .00 .00 .00 .00 .00 .00 .00
LIVESTOCK (GRAZING OR FEEDING OPERATIONS) 133.20 .00 .00 .00 .00 .00 .00 .00 .00
LOSS OF RIPARIAN HABITAT 87.36 .00 .00 .00 .00 .00 .00 .00 .00
MANAGED PASTURE GRAZING 13.98 .00 .00 .00 .00 .00 .00 .00 .00
MINE TAILINGS 6.69 .00 .00 .00 .00 .00 .00 .00 .00
MUNICIPAL (URBANIZED HIGH DENSITY AREA) 595.64 908.00 5.76 .00 .00 .00 .00 .00 .00
MUNICIPAL POINT SOURCE DISCHARGES 114.62 .00 1,090.59 .00 .00 .00 .00 .00 .00
NATURAL CONDITIONS - WATER QUALITY STANDARDS USE ATTAINABILITY ANALYSES NEEDED 1,520.75 64,725.55 107.73 .00 .00 .00 .00 .00 .00
NATURAL SOURCES .00 .00 6.88 .00 .00 .00 .00 .00 .00
NON-POINT SOURCE 1,595.87 251.80 1,107.72 .00 .00 .00 .00 .00 .00
ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENCENTRALIZED SYSTEMS) 175.41 .00 5.76 .00 .00 .00 .00 .00 .00
OTHER SHIPPING RELEASES (WASTES AND DETRITUS) .00 .00 14.65 .00 .00 .00 .00 .00 .00
PACKAGE PLANT OR OTHER PERMITTED SMALL FLOWS DISCHARGES 2.56 .00 .00 .00 .00 .00 .00 .00 .00
RELEASES FROM WASTE SITES OR DUMPS 4.46 .00 .00 .00 .00 .00 .00 .00 .00
RESIDENTIAL DISTRICTS 20.68 .00 .00 .00 .00 .00 .00 .00 .00
SANITARY SEWER OVERFLOWS (COLLECTION SYSTEM FAILURES) 60.46 378.00 .00 .00 .00 .00 .00 .00 .00
SEPTAGE DISPOSAL 31.15 .00 .00 .00 .00 .00 .00 .00 .00
SHIPBUILDING, REPAIRS, DRYDOCKING .00 .00 14.65 .00 .00 .00 .00 .00 .00
SOURCE UNKNOWN 3,262.85 51,738.51 372.61 .00 .00 .00 .00 .00 .00
SOURCES OUTSIDE STATE JURISTICTION OR BORDERS .00 .00 1,089.40 .00 .00 .00 .00 .00 .00
STREAMBANK MODIFICATIONS/DESTABLIZATION 41.46 .00 .00 .00 .00 .00 .00 .00 .00
SURFACE MINING 90.71 .00 .00 .00 .00 .00 .00 .00 .00
UNPERMITTED DISCHARGE (DOMESTIC WASTES) 4.55 .00 .00 .00 .00 .00 .00 .00 .00
UPSTREAM IMPOUNDMENTS (E.G., PL-566 NRCS STRUCTURES) 1.94 .00 .00 .00 .00 .00 .00 .00 .00
UPSTREAM SOURCE 20.75 349.00 .00 .00 .00 .00 .00 .00 .00
WASTES FROM PETS 18.68 .00 .00 .00 .00 .00 .00 .00 .00
WATERFOWL 37.75 .00 .00 .00 .00 .00 .00 .00 .00
WET WEATHER DISCHARGES (POINT SOURCE AND COMBINATION OF STORMWATER, SSO OR CSO) 16.46 .00 .00 .00 .00 .00 .00 .00 .00
WILDLIFE OTHER THAN WATERFOWL 1,616.53 683.00 .00 .00 .00 .00 .00 .00 .00
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