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 MAINE or in the U.S. by assessed use impairments.
Rank watersheds in MAINE by assessed use impairments
Rank states by assessed use impairments, impairments due to specific causes, or impairments due to specific sources

MAINE contains a portion of 21 watersheds.

Percentage of Surface Waters with Reported Problems (state + EPA data): 9%

Number of Waterbodies with Reported Problems (as reported by the state): 226

Beneficial Use Most Frequently Impaired	Percent of All Impairments
Overall Use	50%

Beneficial uses not reported for 100% of waterbodies.

Priority for Regulation	Number of Waterbodies
Targeted	11
High	2
Medium	23
Low	108
Not Assessed for TMDL Priority	51
Not Reported to US EPA for TMDL Priority	31

Rivers, Streams, and Creeks
Number of impaired waterbodies: 139 (cause not reported for 2%)
Percent of Rivers, Streams and Creeks in MAINE assessed by agencies for 1997-98 reporting period: 100%

	Percent Waterbodies Affected
Low Dissolved Oxygen/Organic Enrichment	35%
Pathogens	28%
Impaired Biological Community	17%
PCBs	12%
Other Habitat Alterations	9%
More...

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

Rivers, Streams, and Creeks
Number of impaired waterbodies: 139 (cause not reported for 48%)
Percent of Rivers, Streams and Creeks in MAINE assessed by agencies for 1997-98 reporting period: 100%

	Percent Waterbodies Affected
Impairment source not reported	48%
Nonpoint Sources	48%
Municipal Point Sources	9%
Combined Sewer Overflows	1%

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