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

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

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.

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.