NPS Pollution - Common Sources

Excess fertilizers, herbicides, and insecticides from agricultural and residential areas.
Oil, grease, and toxic chemicals from urban runoff and energy production.
Sediment from improperly managed construction sites, cropland and eroding streambanks.
Salt from irrigation practices and acid drainage from abandoned mines.
Bacteria and nutrients from livestock, pet wastes, and faulty septic systems.
Atmospheric deposition and hydromodification are also sources of nonpoint source pollution.