POLLUTION LOCATOR| Water | State Clean Water Act Status Report

Clean Water Act Status: CONNECTICUT
 
 
  • 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 CONNECTICUT or in the U.S. by assessed use impairments.
    Rank watersheds in CONNECTICUT 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
    CONNECTICUT contains a portion of 9 watersheds:
    Farmington
    Housatonic
    Lower Connecticut
    Pawcatuck-Wood
    Quinebaug
    Quinnipiac
    Saugatuck
    Shetucket
    Thames
    Percentage of Surface Waters with Reported Problems (state + EPA data): 30%
    Number of Waterbodies with Reported Problems (as reported by the state): 223
    Beneficial Use Most Frequently Impaired Percent of All Impairments
    Aquatic Life Support 34%
    Primary Contact Recreation (Swimming) 25%
    Shellfish Consumption 19%
    Fish Consumption 7%
    Aesthetics / Scenic 4%
    Beneficial uses not reported for 100% of waterbodies.


    Priority for Regulation     Number of Waterbodies
    Targeted 10
    High 18
    Medium 0
    Low 58
    Not Assessed for TMDL Priority 56
    Not Reported to US EPA for TMDL Priority 81
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 125 (cause not reported for 15%)
    Percent of Rivers, Streams and Creeks in CONNECTICUT assessed by agencies for 1997-98 reporting period: 16%
      Percent Waterbodies Affected
    Other Habitat Alterations 31%
    Pathogens 26%
    Metals 11%
    Flow Alterations 8%
    Ammonia 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: 56 (cause not reported for 8%)
    Percent of Lakes, Reservoirs and Ponds in CONNECTICUT assessed by agencies for 1997-98 reporting period: 42%
      Percent Waterbodies Affected
    Nutrients 52%
    Sediments 12%
    Mercury 11%
    Metals 11%
    Pathogens 9%
    More...

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 42 (cause not reported for 23%)
    Percent of Estuaries and Bays in CONNECTICUT assessed by agencies for 1997-98 reporting period: 100%
    Percent of Coastal Shorelines in CONNECTICUT assessed by agencies for 1997-98 reporting period: 0%
      Percent Waterbodies Affected
    Pathogens 60%
    Low Dissolved Oxygen/Organic Enrichment 19%
    Contaminated Sediments 12%
    Organic Compounds 10%
    Metals 10%
    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: 125 (cause not reported for 34%)
    Percent of Rivers, Streams and Creeks in CONNECTICUT assessed by agencies for 1997-98 reporting period: 16%
      Percent Waterbodies Affected
    Impairment source not reported 34%
    Hydromodification/Habitat Modification 23%
    Urban Runoff/Storm Sewers 21%
    Agriculture 16%
    Industrial Point Sources 9%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 56 (cause not reported for 46%)
    Percent of Lakes, Reservoirs and Ponds in CONNECTICUT assessed by agencies for 1997-98 reporting period: 42%
      Percent Waterbodies Affected
    Impairment source not reported 46%
    Urban Runoff/Storm Sewers 18%
    Other Sources 12%
    Hydromodification/Habitat Modification 11%
    Municipal Point Sources 9%
    More...

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 42 (cause not reported for 9%)
    Percent of Estuaries and Bays in CONNECTICUT assessed by agencies for 1997-98 reporting period: 100%
    Percent of Coastal Shorelines in CONNECTICUT assessed by agencies for 1997-98 reporting period: 0%
      Percent Waterbodies Affected
    Urban Runoff/Storm Sewers 76%
    Other Sources 64%
    Marinas 43%
    Combined Sewer Overflows 19%
    Septic Systems 19%
    More...

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


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