POLLUTION LOCATOR| Water | Watershed Impairment

Clean Water Act Status: Narragansett 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
    Narragansett contains a portion of 8 counties:
    BRISTOL County, MA
    BRISTOL County, RI
    KENT County, RI
    NEWPORT County, RI
    NORFOLK County, MA
    PLYMOUTH County, MA
    PROVIDENCE County, RI
    WASHINGTON County, RI
    Percentage of Surface Waters with Reported Problems (state + EPA data): 29%
    Number of Waterbodies with Reported Problems (as reported by the state): 183
    Beneficial Use Most Frequently Impaired Percent of All Impairments
    Not Reported 54%
    Overall Use 46%


    Priority for Regulation     Number of Waterbodies
    Targeted 21
    High 22
    Medium 24
    Low 17
    Not Assessed for TMDL Priority 7
    Not Reported to US EPA for TMDL Priority 92
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  • Leading Pollutants/Stressors of Surface Waters
    Rivers, Streams, and Creeks
    Number of impaired waterbodies: 56
    Percent of Rivers, Streams and Creeks in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 18%
    Percent of Rivers, Streams and Creeks in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 54%
      Percent Waterbodies Affected
    Pathogens 52%
    Metals 36%
    Impaired Biological Community 27%
    Nutrients 23%
    Low Dissolved Oxygen/Organic Enrichment 14%
    More...

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 100
    Percent of Lakes, Reservoirs and Ponds in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 56%
    Percent of Lakes, Reservoirs and Ponds in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 75%
      Percent Waterbodies Affected
    Noxious Aquatic Plants 60%
    Nutrients 24%
    Sediments 24%
    Impaired Biological Community 9%
    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: 27
    Percent of Estuaries and Bays in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 8%
    Percent of Estuaries and Bays in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 100%
    Percent of Coastal Shorelines in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 0%
    Percent of Coastal Shorelines in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 100%
      Percent Waterbodies Affected
    Pathogens 59%
    Nutrients 48%
    Impaired Biological Community 7%
    Aesthetics 4%
    Low Dissolved Oxygen/Organic Enrichment 4%
    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: 56(cause not reported for 100%)
    Percent of Rivers, Streams and Creeks in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 18%
    Percent of Rivers, Streams and Creeks in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 54%
      Percent Waterbodies Affected
    Impairment source not reported 100%

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


    Lakes, Reservoirs, and Ponds
    Number of impaired waterbodies: 100(cause not reported for 100%)
    Percent of Lakes, Reservoirs and Ponds in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 56%
    Percent of Lakes, Reservoirs and Ponds in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 75%
      Percent Waterbodies Affected
    Impairment source not reported 100%

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


    Estuaries, Bays, and Coasts
    Number of impaired waterbodies: 27(cause not reported for 100%)
    Percent of Estuaries and Bays in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 8%
    Percent of Estuaries and Bays in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 100%
    Percent of Coastal Shorelines in MASSACHUSETTS assessed by agencies for 1997-98 reporting period: 0%
    Percent of Coastal Shorelines in RHODE ISLAND assessed by agencies for 1997-98 reporting period: 100%
      Percent Waterbodies Affected
    Impairment source not reported 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
    USGS report on the National Water-Quality Assessment (NAWQA) study unit this watershed is in.
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