Non-Point Source Pollution
Pollution that does not originate at a single location. In an urban area, runoff water can be polluted while flowing toward a stream by gasoline, antifreeze, road salt, or other contaminants. In rural areas, runoff can be contaminated by insecticides, manure, or fertilizer. This contamination can be significant but cannot be traced back to a specific source. The photo shows flooding in Wayne County, North Carolina. Flooding in a rural area can mobilize fertilizer, animal waste, and many other pollutants.