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

Upper Big Black contains a portion of 6 counties:

ATTALA County, MS

CARROLL County, MS

CHOCTAW County, MS

HOLMES County, MS

MONTGOMERY County, MS

WEBSTER County, MS

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

Number of Waterbodies with Reported Problems (as reported by the state): 26

Beneficial Use Most Frequently Impaired	Percent of All Impairments
Aquatic Life Support	100%
SecondaryContact Recreation (Boating)	4%

Priority for Regulation	Number of Waterbodies
Targeted	0
High	0
Medium	4
Low	2
Not Assessed for TMDL Priority	20
Not Reported to US EPA for TMDL Priority	0

Rivers, Streams, and Creeks
Number of impaired waterbodies: 26
Percent of Rivers, Streams and Creeks in MISSISSIPPI assessed by agencies for 1997-98 reporting period: 47%

	Percent Waterbodies Affected
Nutrients	77%
Pesticides	77%
Sediments	77%
Low Dissolved Oxygen/Organic Enrichment	50%
Impaired Biological Community	23%
More...

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

Rivers, Streams, and Creeks
Number of impaired waterbodies: 26(cause not reported for 100%)
Percent of Rivers, Streams and Creeks in MISSISSIPPI assessed by agencies for 1997-98 reporting period: 47%

	Percent Waterbodies Affected
Impairment source not reported	100%

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