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

DELAWARE contains a portion of 7 watersheds:

Brandywine-Christina

Broadkill-Smyrna

Chester-Sassafras

Chincoteague

Choptank

Nanticoke

Pocomoke

Percentage of Surface Waters with Reported Problems (state + EPA data): 49%

Number of Waterbodies with Reported Problems (as reported by the state): 377

Rivers, Streams, and Creeks
Number of impaired waterbodies: 326 (cause not reported for 0%)
Percent of Rivers, Streams and Creeks in DELAWARE assessed by agencies for 1997-98 reporting period: 95%

	Percent Waterbodies Affected
Other Habitat Alterations	54%
Impaired Biological Community	34%
Nutrients	29%
Pathogens	26%
Low Dissolved Oxygen/Organic Enrichment	22%
More...

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

Rivers, Streams, and Creeks
Number of impaired waterbodies: 326 (cause not reported for 8%)
Percent of Rivers, Streams and Creeks in DELAWARE assessed by agencies for 1997-98 reporting period: 95%

	Percent Waterbodies Affected
Nonpoint Sources	91%
Impairment source not reported	9%
Municipal Point Sources	7%
Other Sources	2%

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