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Assessment Data for the State of Delaware Year 2002
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Impaired Water Information
Other Water Assessment Information
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State of Delaware websites: | State 305(b) Water Quality Assessment Report(s) |
| State Water Quality Program |
Search for a Waterbody within Delaware
Total Assessed Waters for the State of Delaware
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) | |
| Total Assessed Waters | 2,506.07 | 2,953.90 | 29.54 | 25.00 | .00 | .00 | .00 | .00 |
| Estimated Total Water Size in DE | 2,509.00 | 2,954.00 | 448.50 | 25.00 | Unavailable | Unavailable | Unavailable | Unavailable |
| Percent of Waters Assessed | 99.88 | 100.00 | 6.59 | 100.00 | Unavailable | Unavailable | Unavailable | Unavailable |
Assessed Waters of Delaware by Watershed
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) | |
| BRANDYWINE-CHRISTINA | 439.86 | 725.30 | .00 | .00 | .00 | .00 | .00 | .00 |
| BROADKILL-SMYRNA | 670.96 | 1,112.80 | .00 | 25.00 | .00 | .00 | .00 | .00 |
| CHESTER-SASSAFRAS | 80.50 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CHINCOTEAGUE | 347.60 | 331.00 | 29.54 | 25.00 | .00 | .00 | .00 | .00 |
| CHOPTANK | 160.54 | 60.00 | .00 | .00 | .00 | .00 | .00 | .00 |
| NANTICOKE | 741.30 | 724.80 | .00 | .00 | .00 | .00 | .00 | .00 |
| POCOMOKE | 59.32 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| Name Not Reported | 24.79 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Delaware 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 |
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|---|---|---|---|---|---|---|
 % Threatened |
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 % Impaired |
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Fish, Shellfish, and Wildlife Protection and Propagation | 2,506.07 | 37.06 | .00 | 62.94 | |
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Recreation | 2,506.07 | .66 | .00 | 99.34 | |
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Public Water Supply | 204.50 | 97.07 | .00 | 2.93 | |
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Aquatic Life Harvesting | 5.20 | .00 | .00 | 100.00 | |
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Industrial | 2,479.78 | 100.00 | .00 | .00 | |
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Agricultural | 1,959.11 | 100.00 | .00 | .00 | |
Delaware Assessed Waters
Water Quality Attainment for Rivers and Streams
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 16.50 | .66 |
| Threatened | .00 | .00 |
| Impaired | 2,489.57 | 99.34 |
| Total Miles Assessed | 2,506.07 | 100.00 |
Delaware Top Causes of Impairments
for Rivers and Streams
Description of this table
| # | State Cause Name | Total Miles Impaired |
|---|---|---|
| 1 | PATHOGENS | 1,026.92 |
| 2 | NUTRIENTS | 134.08 |
| 3 | ORGANIC ENRICHMENT/LOW DO | 87.68 |
| 4 | PRIORITY ORGANICS | 65.10 |
| 5 | METALS | 57.60 |
| 6 | AMMONIA (UNIONIZED) - TOXIN | 21.30 |
| 7 | PESTICIDES | 12.80 |
Delaware Top Probable Sources of Impairments
for Rivers and Streams
Description of this table
| # | State Source Name | Total Miles Impaired by Source |
|---|---|---|
| 1 | AGRICULTURE | 984.03 |
| 2 | NATURAL SOURCES | 423.51 |
| 3 | MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 304.07 |
| 4 | LAND DISPOSAL | 213.44 |
| 5 | ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENTRALIZED SYSTEMS) | 198.24 |
| 6 | MUNICIPAL POINT SOURCE DISCHARGES | 118.42 |
| 7 | INDUSTRIAL POINT SOURCE DISCHARGE | 104.99 |
| 8 | SOURCE UNKNOWN | 52.30 |
| 9 | RCRA HAZARDOUS WASTE SITES | 10.00 |
| 10 | COMBINED SEWER OVERFLOWS | 9.30 |
Delaware 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 |
||||||
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Fish, Shellfish, and Wildlife Protection and Propagation | 2,953.90 | 76.85 | .00 | 23.15 | |
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Recreation | 2,953.90 | 5.35 | .00 | 94.65 | |
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Public Water Supply | 295.60 | 100.00 | .00 | .00 | |
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Industrial | 2,953.90 | 100.00 | .00 | .00 | |
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Agricultural | 2,764.60 | 100.00 | .00 | .00 | |
Delaware Assessed Waters
Water Quality Attainment for Lakes, Ponds and Reservoirs
Description of this table
| Attainment Status | Acres | Percent of Assessed |
| Good | 158.00 | 5.35 |
| Threatened | .00 | .00 |
| Impaired | 2,795.90 | 94.65 |
| Total Acres Assessed | 2,953.90 | 100.00 |
Delaware Top Causes of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Cause Name | Total Acres Impaired |
|---|---|---|
| 1 | PATHOGENS | 970.40 |
| 2 | PRIORITY ORGANICS | 157.80 |
| 3 | NUTRIENTS | 150.00 |
Delaware Top Probable Sources of Impairments
for Lakes, Ponds and Reservoirs
Description of this table
| # | State Source Name | Total Acres Impaired by Source |
|---|---|---|
| 1 | AGRICULTURE | 784.10 |
| 2 | NATURAL SOURCES | 510.70 |
| 3 | MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 490.40 |
| 4 | SOURCE UNKNOWN | 157.80 |
| 5 | LAND DISPOSAL | 88.00 |
| 6 | OFF-FARM ANIMAL HOLDING/MANAGEMENT AREA | 88.00 |
| 7 | ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENTRALIZED SYSTEMS) | 88.00 |
Delaware 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 |
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Fish, Shellfish, and Wildlife Protection and Propagation | 28.95 | .00 | .00 | 100.00 | |
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Recreation | 29.54 | .00 | .00 | 100.00 | |
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Aquatic Life Harvesting | 14.54 | 4.06 | .00 | 95.94 | |
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Industrial | 28.95 | 100.00 | .00 | .00 | |
Delaware Assessed Waters
Water Quality Attainment for Bays and Estuaries
Description of this table
| Attainment Status | Square Miles | Percent of Assessed |
| Good | .00 | .00 |
| Threatened | .00 | .00 |
| Impaired | 29.54 | 100.00 |
| Total Square Miles Assessed | 29.54 | 100.00 |
Delaware Top Causes of Impairments
for Bays and Estuaries
Description of this table
| # | State Cause Name | Total Square Miles Impaired |
|---|---|---|
| 1 | ORGANIC ENRICHMENT/LOW DO | 28.00 |
| 2 | NUTRIENTS | 28.00 |
| 3 | PATHOGENS | 25.00 |
| 4 | TOTAL SUSPENDED SOLIDS (TSS) | 12.00 |
Delaware Top Probable Sources of Impairments
for Bays and Estuaries
Description of this table
| # | State Source Name | Total Square Miles Impaired by Source |
|---|---|---|
| 1 | MUNICIPAL POINT SOURCE DISCHARGES | 25.00 |
| 2 | ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENTRALIZED SYSTEMS) | 13.00 |
| 3 | LAND DISPOSAL | 13.00 |
| 4 | AGRICULTURE | 12.00 |
| 5 | SOURCE UNKNOWN | 3.00 |
| 6 | NATURAL SOURCES | 3.00 |
Delaware 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 |
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Fish, Shellfish, and Wildlife Protection and Propagation | 25.00 | 100.00 | .00 | .00 | |
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Recreation | 25.00 | 100.00 | .00 | .00 | |
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Industrial | 25.00 | 100.00 | .00 | .00 | |
Delaware Assessed Waters
Water Quality Attainment for Coastal Shorelines
Description of this table
| Attainment Status | Miles | Percent of Assessed |
| Good | 25.00 | 100.00 |
| Threatened | .00 | .00 |
| Impaired | .00 | .00 |
| Total Miles Assessed | 25.00 | 100.00 |
Delaware Top Causes of Impairments
for Coastal Shorelines
Description of this table
| # | State Cause Name | Total Miles Impaired |
|---|---|---|
| 1 | PATHOGENS | 25.00 |
Delaware Top Probable Sources of Impairments
for Coastal Shorelines
Description of this table
| # | State Source Name | Total Miles Impaired by Source |
|---|---|---|
| 1 | MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 25.00 |
Delaware
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 (Squar Miles) | |
| PRIORITY ORGANICS | 65.10 | 157.80 | .00 | .00 | .00 | .00 | .00 | .00 |
| TOTAL SUSPENDED SOLIDS (TSS) | .00 | .00 | 12.00 | .00 | .00 | .00 | .00 | .00 |
| METALS | 57.60 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| PATHOGENS | 1,026.92 | 970.40 | 25.00 | 25.00 | .00 | .00 | .00 | .00 |
| AMMONIA (UNIONIZED) - TOXIN | 21.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| ORGANIC ENRICHMENT/LOW DO | 87.68 | .00 | 28.00 | .00 | .00 | .00 | .00 | .00 |
| NUTRIENTS | 134.08 | 150.00 | 28.00 | .00 | .00 | .00 | .00 | .00 |
| PESTICIDES | 12.80 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
Delaware
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) | |
| LAND DISPOSAL | 213.44 | 88.00 | 13.00 | .00 | .00 | .00 | .00 | .00 |
| SITE CLEARANCE (LAND DEVELOPMENT OR REDEVELOPMENT) | 8.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| CONSTRUCTION | 8.20 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL (URBANIZED HIGH DENSITY AREA) | 304.07 | 490.40 | .00 | 25.00 | .00 | .00 | .00 | .00 |
| AGRICULTURE | 984.03 | 784.10 | 12.00 | .00 | .00 | .00 | .00 | .00 |
| NATURAL SOURCES | 423.51 | 510.70 | 3.00 | .00 | .00 | .00 | .00 | .00 |
| COMBINED SEWER OVERFLOWS | 9.30 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| MUNICIPAL POINT SOURCE DISCHARGES | 118.42 | .00 | 25.00 | .00 | .00 | .00 | .00 | .00 |
| ON-SITE TREATMENT SYSTEMS (SEPTIC SYSTEMS AND SIMILAR DECENTRALIZED SYSTEMS) | 198.24 | 88.00 | 13.00 | .00 | .00 | .00 | .00 | .00 |
| SOURCE UNKNOWN | 52.30 | 157.80 | 3.00 | .00 | .00 | .00 | .00 | .00 |
| RCRA HAZARDOUS WASTE SITES | 10.00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| INDUSTRIAL POINT SOURCE DISCHARGE | 104.99 | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| OFF-FARM ANIMAL HOLDING/MANAGEMENT AREA | .00 | 88.00 | .00 | .00 | .00 | .00 | .00 | .00 |
