POLLUTION LOCATOR| Water | State Clean Water Act Status Report

Clean Water Act Status: LOUISIANA
 
 
  • 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 LOUISIANA or in the U.S. by assessed use impairments.
    Rank watersheds in LOUISIANA 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
    LOUISIANA contains a portion of 53 watersheds.
    Percentage of Surface Waters with Reported Problems (state + EPA data): 22%
    Number of Waterbodies with Reported Problems (as reported by the state): 196
    Beneficial Use Most Frequently Impaired Percent of All Impairments
    Aesthetics / Scenic 94%
    Shellfish Consumption 92%
    Drinking Water Supply 91%
    Aquatic Life Support 86%
    Wildlife Support 86%
    Agriculture 85%
    Primary Contact Recreation (Swimming) 47%
    SecondaryContact Recreation (Boating) 35%
    Beneficial uses not reported for 100% of waterbodies.


    Priority for Regulation     Number of Waterbodies
    Targeted 0
    High 63
    Medium 35
    Low 97
    Not Assessed for TMDL Priority 0
    Not Reported to US EPA for TMDL Priority 1
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 136
    Percent of Rivers, Streams and Creeks in LOUISIANA assessed by agencies for 1997-98 reporting period: 9%
      Percent Waterbodies Affected
    Pathogens 56%
    Mercury 56%
    Low Dissolved Oxygen/Organic Enrichment 55%
    Metals 49%
    Sediments 21%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 32
    Percent of Lakes, Reservoirs and Ponds in LOUISIANA assessed by agencies for 1997-98 reporting period: 35%
      Percent Waterbodies Affected
    Mercury 44%
    Metals 38%
    Pathogens 34%
    Low Dissolved Oxygen/Organic Enrichment 28%
    Nutrients 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: 15
    Percent of Estuaries and Bays in LOUISIANA assessed by agencies for 1997-98 reporting period: 40%
    Percent of Coastal Shorelines in LOUISIANA assessed by agencies for 1997-98 reporting period: 0%
      Percent Waterbodies Affected
    Mercury 60%
    Low Dissolved Oxygen/Organic Enrichment 33%
    Pathogens 33%
    Metals 20%
    Nutrients 13%
    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: 136
    Percent of Rivers, Streams and Creeks in LOUISIANA assessed by agencies for 1997-98 reporting period: 9%
      Percent Waterbodies Affected
    Unknown Sources 71%
    Other Sources 56%
    Municipal Point Sources 33%
    Agriculture 26%
    Land Disposal 26%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 32
    Percent of Lakes, Reservoirs and Ponds in LOUISIANA assessed by agencies for 1997-98 reporting period: 35%
      Percent Waterbodies Affected
    Unknown Sources 66%
    Other Sources 59%
    Urban Runoff/Storm Sewers 22%
    Municipal Point Sources 19%
    Industrial Point Sources 16%
    More...

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 15
    Percent of Estuaries and Bays in LOUISIANA assessed by agencies for 1997-98 reporting period: 40%
    Percent of Coastal Shorelines in LOUISIANA assessed by agencies for 1997-98 reporting period: 0%
      Percent Waterbodies Affected
    Other Sources 73%
    Unknown Sources 73%
    Combined Sewer Overflows 20%
    Land Disposal 20%
    Urban Runoff/Storm Sewers 20%
    More...

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


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