What are the Effects on Our Waters?
States report that nonpoint source pollution is the leading remaining cause of water quality problems.
The effects of nonpoint source pollutants on specific waters vary and may not always be fully assessed.
However, we know that these pollutants have harmful effects on drinking water supplies, recreation, fisheries, and wildlife.
Courtesy EPA's pollution brochure EPA-841-F-94-005, 1994, "Urban Stormwater Runoff".