POLLUTION LOCATOR| Water | Watershed Impairment

Clean Water Act Status: Patuxent Watershed
 
 
  • Clean Water Act Comparative Ranking
    Cleanest/Best Watersheds National Average Dirtiest/Worst Watersheds
    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 watersheds by assessed use impairments
    Rank counties 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
    Patuxent contains a portion of 7 counties:
    ANNE ARUNDEL County, MD
    CALVERT County, MD
    CHARLES County, MD
    HOWARD County, MD
    MONTGOMERY County, MD
    PRINCE GEORGE'S County, MD
    ST. MARY'S County, MD
    Percentage of Surface Waters with Reported Problems (state + EPA data): 46%
    Number of Waterbodies with Reported Problems (as reported by the state): 23
    Beneficial Use Most Frequently Impaired Percent of All Impairments
    Not Reported 100%


    Priority for Regulation     Number of Waterbodies
    Targeted 1
    High 12
    Medium 3
    Low 7
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 0
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 9
    Percent of Rivers, Streams and Creeks in MARYLAND assessed by agencies for 1997-98 reporting period: 39%
      Percent Waterbodies Affected
    Nutrients 78%
    Sediments 67%
    Metals 22%

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 5
    Percent of Lakes, Reservoirs and Ponds in MARYLAND assessed by agencies for 1997-98 reporting period: 27%
      Percent Waterbodies Affected
    Nutrients 60%
    Sediments 40%

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 9
    Percent of Estuaries and Bays in MARYLAND assessed by agencies for 1997-98 reporting period: 98%
    Percent of Coastal Shorelines in MARYLAND assessed by agencies for 1997-98 reporting period: 100%
      Percent Waterbodies Affected
    Pathogens 100%

    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: 9
    Percent of Rivers, Streams and Creeks in MARYLAND assessed by agencies for 1997-98 reporting period: 39%
      Percent Waterbodies Affected
    Natural Sources 100%
    Nonpoint Sources 100%
    Municipal Point Sources 11%

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 5
    Percent of Lakes, Reservoirs and Ponds in MARYLAND assessed by agencies for 1997-98 reporting period: 27%
      Percent Waterbodies Affected
    Nonpoint Sources 100%

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 9
    Percent of Estuaries and Bays in MARYLAND assessed by agencies for 1997-98 reporting period: 98%
    Percent of Coastal Shorelines in MARYLAND assessed by agencies for 1997-98 reporting period: 100%
      Percent Waterbodies Affected
    Nonpoint Sources 100%

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


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  • Links
    U.S. EPA Watershed Health Index
    U.S. EPA Condition and Vulnerability Indicators
    U.S. EPA Watershed Profile
    U.S. Geological Survey: Water Resources Links
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