POLLUTION LOCATOR| Water | County Clean Water Act Status Report

Clean Water Act Status: LOUDOUN County, VA
 
 
  • Clean Water Act Comparative Ranking
    Cleanest/Best Counties National Average Dirtiest/Worst Counties
    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 VIRGINIA or in the U.S. by assessed use impairments.
    Rank watersheds in VIRGINIA 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
    LOUDOUN County contains a portion of 2 watersheds:
    Middle Potomac-Anacostia-Occoquan
    Middle Potomac-Catoctin
    Percentage of Surface Waters with Reported Problems (state + EPA data): 24%
    Number of Waterbodies with Reported Problems (as reported by the state): 94

    Priority for Regulation     Number of Waterbodies
    Targeted 0
    High 10
    Medium 6
    Low 34
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 44
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 80
    Percent of Rivers, Streams and Creeks in VIRGINIA assessed by agencies for 1997-98 reporting period: 39%
      Percent Waterbodies Affected
    Pathogens 32%
    Ammonia 30%
    Organic Compounds 26%
    Nutrients 19%
    Sediments 15%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 8
    Percent of Lakes, Reservoirs and Ponds in VIRGINIA assessed by agencies for 1997-98 reporting period: 93%
      Percent Waterbodies Affected
    Nutrients 50%
    Pathogens 38%
    Organic Compounds 25%
    Sediments 25%
    Metals 12%
    More...

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 6
    Percent of Estuaries and Bays in VIRGINIA assessed by agencies for 1997-98 reporting period: 99%
    Percent of Coastal Shorelines in VIRGINIA assessed by agencies for 1997-98 reporting period: 0%
      Percent Waterbodies Affected
    Organic Compounds 100%
    Pathogens 100%
    Low Dissolved Oxygen/Organic Enrichment 33%
    Sediments 33%
    pH 33%
    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: 80 (cause not reported for 33%)
    Percent of Rivers, Streams and Creeks in VIRGINIA assessed by agencies for 1997-98 reporting period: 39%
      Percent Waterbodies Affected
    Nonpoint Sources 45%
    Impairment source not reported 34%
    Unknown Sources 21%
    Natural Sources 16%
    Municipal Point Sources 8%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 8
    Percent of Lakes, Reservoirs and Ponds in VIRGINIA assessed by agencies for 1997-98 reporting period: 93%
      Percent Waterbodies Affected
    Nonpoint Sources 100%
    Combined Sewer Overflows 12%

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 6
    Percent of Estuaries and Bays in VIRGINIA assessed by agencies for 1997-98 reporting period: 99%
    Percent of Coastal Shorelines in VIRGINIA assessed by agencies for 1997-98 reporting period: 0%
      Percent Waterbodies Affected
    Nonpoint Sources 100%
    Combined Sewer Overflows 83%
    Municipal Point Sources 67%

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


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    Email EPA
    Join an online discussion about pollution in LOUDOUN County


    Email a Scorecard Community Report to a friend
    Network with environmental groups
    Learn how to use Scorecard to find out about toxics in your community


    Contribute to Environmental Defense
    Volunteer with environmental groups in your community

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  • Links
    Scorecard's report on
    Drinking Water Sources for this County
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