POLLUTION LOCATOR| Water | State Clean Water Act Status Report

Clean Water Act Status: DELAWARE
 
 
  • Clean Water Act Comparative Ranking
    Cleanest/Best States National Average Dirtiest/Worst States
    0%         50%         100%

    Percentage of Surface Waters with Impaired or Threatened Uses (state + EPA data):
    Number of Impaired Waterbodies (as reported by the state):

    NOTE: Data limitations affect the accuracy of these rankings.

    Rank counties in DELAWARE or in the U.S. by assessed use impairments.
    Rank watersheds in DELAWARE by assessed use impairments
    Rank states by assessed use impairments, impairments due to specific causes, or impairments due to specific sources

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  • 1998 Clean Water Act Status
    DELAWARE contains a portion of 7 watersheds:
    Brandywine-Christina
    Broadkill-Smyrna
    Chester-Sassafras
    Chincoteague
    Choptank
    Nanticoke
    Pocomoke
    Percentage of Surface Waters with Reported Problems (state + EPA data): 49%
    Number of Waterbodies with Reported Problems (as reported by the state): 377
    Beneficial uses not reported for 100% of waterbodies.

    Priority for Regulation     Number of Waterbodies
    Targeted 0
    High 0
    Medium 0
    Low 0
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 377
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 326 (cause not reported for 0%)
    Percent of Rivers, Streams and Creeks in DELAWARE assessed by agencies for 1997-98 reporting period: 95%
      Percent Waterbodies Affected
    Other Habitat Alterations 54%
    Impaired Biological Community 34%
    Nutrients 29%
    Pathogens 26%
    Low Dissolved Oxygen/Organic Enrichment 22%
    More...

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 44
    Percent of Lakes, Reservoirs and Ponds in DELAWARE assessed by agencies for 1997-98 reporting period: 94%
      Percent Waterbodies Affected
    Nutrients 89%
    Pathogens 77%
    Low Dissolved Oxygen/Organic Enrichment 25%
    PCBs 7%

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 7
    Percent of Estuaries and Bays in DELAWARE assessed by agencies for 1997-98 reporting period: 4%
    Percent of Coastal Shorelines in DELAWARE assessed by agencies for 1997-98 reporting period: 100%
      Percent Waterbodies Affected
    Pathogens 86%
    Nutrients 57%
    Low Dissolved Oxygen/Organic Enrichment 43%
    PCBs 29%
    Toxics 14%
    More...

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


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  • Leading Sources of Water Quality Problems
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 326 (cause not reported for 8%)
    Percent of Rivers, Streams and Creeks in DELAWARE assessed by agencies for 1997-98 reporting period: 95%
      Percent Waterbodies Affected
    Nonpoint Sources 91%
    Impairment source not reported 9%
    Municipal Point Sources 7%
    Other Sources 2%

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 44 (cause not reported for 6%)
    Percent of Lakes, Reservoirs and Ponds in DELAWARE assessed by agencies for 1997-98 reporting period: 94%
      Percent Waterbodies Affected
    Nonpoint Sources 93%
    Municipal Point Sources 11%
    Impairment source not reported 7%

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 7
    Percent of Estuaries and Bays in DELAWARE assessed by agencies for 1997-98 reporting period: 4%
    Percent of Coastal Shorelines in DELAWARE assessed by agencies for 1997-98 reporting period: 100%
      Percent Waterbodies Affected
    Nonpoint Sources 100%
    Municipal Point Sources 57%

    NOTE: Possible inconsistencies between data on (a) impaired waterbodies and (b) percentage of waterbodies assessed.


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