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Assessment Data for the State of Rhode Island Year 2004
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| NOTE: Rhode Island's Estimated Total Water Size is based on 1:24,000 scale NHD |
State of Rhode Island websites: | State 305(b) Water Quality Assessment Report(s) |
| State Water Quality Program |
Search for a Waterbody within Rhode Island
Total Assessed Waters for the State of Rhode Island
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 | 569.71 | 16,742.25 | 156.23 | 78.62 | .00 | .00 | .00 | .00 | .00 |
| Estimated Total Water Size in RI | 1,498.00 | 20,917.00 | 156.23 | 79.00 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
| Percent of Waters Assessed | 38.03 | 80.04 | 100.00 | 99.52 | Unavailable | Unavailable | Unavailable | Unavailable | Unavailable |
Assessed Waters of Rhode Island 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 | 7.72 | 2.44 | 29.19 | 78.62 | .00 | .00 | .00 | .00 | .00 |
| BLACKSTONE | 76.14 | 2,273.58 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CAPE COD | 17.84 | 516.96 | .90 | .00 | .00 | .00 | .00 | .00 | .00 |
| NARRAGANSETT | 278.45 | 9,628.66 | 116.93 | .00 | .00 | .00 | .00 | .00 | .00 |
| PAWCATUCK-WOOD | 177.71 | 3,769.81 | 11.35 | .00 | .00 | .00 | .00 | .00 | .00 |
| QUINEBAUG | 26.81 | 550.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Rhode Island 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 |  % Good |
|---|---|---|---|---|---|
 % Threatened |
|||||
 % Impaired |
|||||
| FISH CONSUMPTION | 7.72 | .00 | .00 | 100.00 | |
| FISH, OTHER AQUATIC LIFE AND WILDLIFE. | 538.57 | 75.48 | .00 | 24.52 | |
| PUBLIC DRINKING WATER SUPPLY | 4.04 | 100.00 | .00 | .00 | |
| RECREATION | 456.92 | 71.02 | .00 | 28.98 | |
Rhode Island Assessed Waters
Water Quality Attainment for Rivers and Streams
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 374.03 | 65.65 |
| Threatened | .00 | .00 |
| Impaired | 195.68 | 34.35 |
| Total Miles Assessed | 569.71 | 100.00 |
Rhode Island Top Causes of Impairments
for Rivers and Streams
Description of this table
| # | State Cause Name | Total Miles Impaired |
|---|---|---|
| 1 | PATHOGENS | 130.13 |
| 2 | METALS | 104.97 |
| 3 | BIODIVERSITY IMPACTS | 80.11 |
| 4 | ORGANIC ENRICHMENT/LOW DO | 35.69 |
| 5 | NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS | 29.21 |
| 6 | AMMONIA (UN-IONIZED) | 18.89 |
| 7 | DIOXIN (INCLUDING 2,3,7,8-TCDD) | 7.72 |
| 8 | POLYCHLORINATED BIPHENYLS | 7.72 |
| 9 | ALGAL GRWTH/CHLOROPHYLL A | 4.24 |
| 10 | UNKNOWN TOXICITY | 4.09 |
Rhode Island Top Probable Sources of Impairments
for Rivers and Streams
Description of this table
| # | State Source Name | Total Miles Impaired by Source |
|---|---|---|
| 1 | URBAN RUNOFF/STORM SEWERS | 152.23 |
| 2 | LAND DISPOSAL | 56.57 |
| 3 | SOURCE UNKNOWN | 55.58 |
| 4 | MUNICIPAL POINT SOURCE DISCHARGES | 40.82 |
| 5 | NATURAL SOURCES | 39.92 |
| 6 | INDUSTRIAL POINT SOURCE DISCHARGE | 28.27 |
| 7 | HYDROMODIFICATION | 23.53 |
| 8 | AGRICULTURE | 21.01 |
| 9 | SEDIMENT RESUSPENSION | 16.61 |
| 10 | GROUNDWATER LOADINGS | 13.15 |
Rhode Island 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 | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| FISH CONSUMPTION | 502.93 | .00 | .00 | 100.00 | |
| FISH, OTHER AQUATIC LIFE AND WILDLIFE. | 15,662.99 | 79.89 | .00 | 20.11 | |
| PUBLIC DRINKING WATER SUPPLY | 5,483.97 | 98.91 | .08 | 1.00 | |
| RECREATION | 14,722.61 | 94.63 | .00 | 5.37 | |
Rhode Island Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 13,042.56 | 77.90 |
| Threatened | 4.54 | .03 |
| Impaired | 3,695.15 | 22.07 |
| Total Acres Assessed | 16,742.25 | 100.00 |
Rhode Island Top Causes of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS | 2,037.25 |
| 2 | ORGANIC ENRICHMENT/LOW DO | 1,467.24 |
| 3 | ALGAL GRWTH/CHLOROPHYLL A | 1,466.61 |
| 4 | METALS | 1,228.17 |
| 5 | PATHOGENS | 791.30 |
| 6 | BIODIVERSITY IMPACTS | 575.79 |
| 7 | NOXIOUS AQUATIC PLANTS | 297.61 |
| 8 | EXOTIC SPECIES | 219.37 |
| 9 | TURBIDITY | 121.70 |
| 10 | SEDIMENTATION/SILTATION | 108.97 |
Rhode Island Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Source Name | Total Acres Impaired by Source |
|---|---|---|
| 1 | URBAN RUNOFF/STORM SEWERS | 2,205.65 |
| 2 | LAND DISPOSAL | 1,230.48 |
| 3 | SOURCE UNKNOWN | 789.38 |
| 4 | AGRICULTURE | 715.50 |
| 5 | HYDROMODIFICATION | 609.45 |
| 6 | ATMOSPHERIC DEPOSITON - TOXICS | 480.13 |
| 7 | NATURAL SOURCES | 333.77 |
| 8 | RECREATION AND TOURISM ACTIVITIES (OTHER THAN BOATING - SEE 7900) | 307.96 |
| 9 | MUNICIPAL POINT SOURCE DISCHARGES | 252.75 |
| 10 | INTERNAL NUTRIENT RECYCLING | 224.40 |
Rhode Island 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 | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| FISH, OTHER AQUATIC LIFE AND WILDLIFE. | 116.46 | 64.04 | .00 | 35.96 | |
| RECREATION | 155.75 | 90.08 | .00 | 9.92 | |
| SHELLFISHING | 131.37 | 79.37 | .00 | 20.63 | |
Rhode Island Assessed Waters
Water Quality Attainment for Bays and Estuaries
Description of this table
| Attainment Status | Square Miles | Percent of Assessed |
| Good | 108.66 | 69.55 |
| Threatened | .00 | .00 |
| Impaired | 47.57 | 30.45 |
| Total Square Miles Assessed | 156.23 | 100.00 |
Rhode Island Top Causes of Impairments
for Bays and Estuaries
Description of this table
| # | State Cause Name | Total Square Miles Impaired |
|---|---|---|
| 1 | PATHOGENS | 41.67 |
| 2 | ORGANIC ENRICHMENT/LOW DO | 40.96 |
| 3 | NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS | 39.49 |
| 4 | BIODIVERSITY IMPACTS | 10.72 |
| 5 | TEMPERATURE, WATER | 9.82 |
| 6 | ALGAL GRWTH/CHLOROPHYLL A | 6.06 |
| 7 | TOTAL TOXICS | .99 |
| 8 | UNKNOWN TOXICITY | .03 |
Rhode Island Top Probable Sources of Impairments
for Bays and Estuaries
Description of this table
| # | State Source Name | Total Square Miles Impaired by Source |
|---|---|---|
| 1 | URBAN RUNOFF/STORM SEWERS | 45.33 |
| 2 | COMBINED SEWER OVERFLOWS | 24.28 |
| 3 | MUNICIPAL POINT SOURCE DISCHARGES | 19.96 |
| 4 | INDUSTRIAL POINT SOURCE DISCHARGE | 9.82 |
| 5 | MARINAS | 7.00 |
| 6 | LAND DISPOSAL | 6.83 |
| 7 | NATURAL SOURCES | 3.81 |
| 8 | GROUNDWATER LOADINGS | 3.51 |
| 9 | SOURCE UNKNOWN | 3.25 |
| 10 | AGRICULTURE | 2.55 |
Rhode Island Assessed Waters
Individual Use Support for Coastal Shorelines
Description of this table
| State Designated Use | Total Miles Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % Threatened |
|||||
| % Impaired |
|||||
| RECREATION | 78.62 | 100.00 | .00 | .00 | |
| SHELLFISHING | 78.62 | 100.00 | .00 | .00 | |
Rhode Island Assessed Waters
Water Quality Attainment for Coastal Shorelines
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 78.62 | 100.00 |
| Threatened | .00 | .00 |
| Impaired | .00 | .00 |
| Total Miles Assessed | 78.62 | 100.00 |
Rhode Island Top Causes of Impairments
for Coastal Shorelines
No Causes of Impairment Reported.
Rhode Island Top Probable Sources of Impairments
for Coastal Shorelines
No Probable Sources Reported.
Rhode Island
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) | |
| ALGAL GRWTH/CHLOROPHYLL A | 4.24 | 1,466.61 | 6.06 | .00 | .00 | .00 | .00 | .00 | .00 |
| AMMONIA (UN-IONIZED) | 18.89 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| BIODIVERSITY IMPACTS | 80.11 | 575.79 | 10.72 | .00 | .00 | .00 | .00 | .00 | .00 |
| DIOXIN (INCLUDING 2,3,7,8-TCDD) | 7.72 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| EXOTIC SPECIES | .00 | 219.37 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| METALS | 104.97 | 1,228.17 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NOXIOUS AQUATIC PLANTS | 1.59 | 297.61 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NUTRIENT/EUTROPHICATION BIOLOGICAL INDICATORS | 29.21 | 2,037.25 | 39.49 | .00 | .00 | .00 | .00 | .00 | .00 |
| ORGANIC ENRICHMENT/LOW DO | 35.69 | 1,467.24 | 40.96 | .00 | .00 | .00 | .00 | .00 | .00 |
| PATHOGENS | 130.13 | 791.30 | 41.67 | .00 | .00 | .00 | .00 | .00 | .00 |
| POLYCHLORINATED BIPHENYLS | 7.72 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SALINITY/TDS/CHLORIDES | .00 | 26.26 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENTATION/SILTATION | .00 | 108.97 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOLIDS (SUSPENDED/BEDLOAD) | .00 | 26.26 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TASTE AND ODOR | .00 | 54.97 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| TEMPERATURE, WATER | .00 | .00 | 9.82 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL TOXICS | .00 | .00 | .99 | .00 | .00 | .00 | .00 | .00 | .00 |
| TURBIDITY | .00 | 121.70 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| UNKNOWN TOXICITY | 4.09 | .00 | .03 | .00 | .00 | .00 | .00 | .00 | .00 |
Rhode Island
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) | |
| AGRICULTURE | 21.01 | 715.50 | 2.55 | .00 | .00 | .00 | .00 | .00 | .00 |
| ATMOSPHERIC DEPOSITION | .00 | 33.17 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ATMOSPHERIC DEPOSITON - TOXICS | 6.37 | 480.13 | .73 | .00 | .00 | .00 | .00 | .00 | .00 |
| COMBINED SEWER OVERFLOWS | 10.56 | 37.97 | 24.28 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONSTRUCTION | 4.00 | 143.35 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONTAMINATED SEDIMENTS | 7.72 | .00 | .90 | .00 | .00 | .00 | .00 | .00 | .00 |
| GROUNDWATER LOADINGS | 13.15 | 201.65 | 3.51 | .00 | .00 | .00 | .00 | .00 | .00 |
| HABITAT MODIFICATION - OTHER THAN HYDROMODIFICATION | .00 | 66.13 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| HYDROMODIFICATION | 23.53 | 609.45 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| INDUSTRIAL POINT SOURCE DISCHARGE | 28.27 | 130.27 | 9.82 | .00 | .00 | .00 | .00 | .00 | .00 |
| INTERNAL NUTRIENT RECYCLING | .00 | 224.40 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| LAND DISPOSAL | 56.57 | 1,230.48 | 6.83 | .00 | .00 | .00 | .00 | .00 | .00 |
| MARINAS | .00 | .00 | 7.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL POINT SOURCE DISCHARGES | 40.82 | 252.75 | 19.96 | .00 | .00 | .00 | .00 | .00 | .00 |
| NATURAL SOURCES | 39.92 | 333.77 | 3.81 | .00 | .00 | .00 | .00 | .00 | .00 |
| RECREATION AND TOURISM ACTIVITIES (OTHER THAN BOATING - SEE 7900) | 2.49 | 307.96 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| RESOURCE EXTRACTION | 3.55 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SEDIMENT RESUSPENSION | 16.61 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| SOURCE UNKNOWN | 55.58 | 789.38 | 3.25 | .00 | .00 | .00 | .00 | .00 | .00 |
| URBAN RUNOFF/STORM SEWERS | 152.23 | 2,205.65 | 45.33 | .00 | .00 | .00 | .00 | .00 | .00 |
