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

Seal Beach contains a portion of 1 counties:

ORANGE County, CA

Percentage of Surface Waters with Reported Problems (state + EPA data): 100%

Number of Waterbodies with Reported Problems (as reported by the state): 4

Anaheim Bay

Huntington Harbour

Newport Bay, Lower

Upper Newport Bay Ecological Reserve

Beneficial Use Most Frequently Impaired	Percent of All Impairments
Not Reported	100%

Priority for Regulation	Number of Waterbodies
Targeted	0
High	2
Medium	0
Low	2
Not Assessed for TMDL Priority	0
Not Reported to US EPA for TMDL Priority	0

Estuaries, Bays, and Coasts
Number of impaired waterbodies: 4
Percent of Estuaries and Bays in CALIFORNIA assessed by agencies for 1997-98 reporting period: 89%
Percent of Coastal Shorelines in CALIFORNIA assessed by agencies for 1997-98 reporting period: 57%

	Percent Waterbodies Affected
Metals	100%
Pesticides	100%
Pathogens	75%
Nutrients	50%
Organic Compounds	25%
More...

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

Estuaries, Bays, and Coasts
Number of impaired waterbodies: 4
Percent of Coastal Shorelines in CALIFORNIA assessed by agencies for 1997-98 reporting period: 57%
Percent of Estuaries and Bays in CALIFORNIA assessed by agencies for 1997-98 reporting period: 89%

	Percent Waterbodies Affected
Nonpoint Sources	100%
Urban Runoff/Storm Sewers	100%
Agriculture	50%
Marinas	50%
Construction	25%
More...

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

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.