POLLUTION LOCATOR
|
Water
| Leading Sources of Water Quality Impairment
Region Name:
Entire United States
Rivers, Streams, and Creeks
Number of
Impairments
Percent of all
Impairments
Impairment source not reported
8601
52%
Agriculture
2444
15%
Nonpoint Sources
1691
10%
Resource Extraction
1616
10%
Hydromodification/Habitat Modification
1349
8%
Municipal Point Sources
1285
8%
Urban Runoff/Storm Sewers
983
6%
Unknown Sources
809
5%
Other Sources
585
4%
Construction
411
2%
Natural Sources
329
2%
Silviculture
289
2%
Land Disposal
225
1%
Industrial Point Sources
170
1%
Combined Sewer Overflows
123
1%
Atmospheric Deposition
104
1%
Septic Systems
80
0%
Contaminated Sediments
62
0%
Domestic Wastewater Lagoon
19
0%
Marinas
8
0%
