Non-Point Source Pollution

Pollutants from non-point sources come from dispersed locations throughout a watershed and many different individuals and groups may be involved as well as nature. Sediment, nutrients, unwanted chemicals, and pathogens may come from land development, forestry activities, building sites, agriculture, poorly maintained or improperly installed septic tanks, or stormwater runoff from roads. Nearly all human activity can have an adverse effect on water quality. There are also naturally occurring sources of pollution, such as bacteria from animals in the watershed , ash and minerals from fires, and mineral contamination from rocks and soil. Non-point source pollution enters waterways as water flows across the ground or underground in the groundwater, rather than moving through a pipe with outlets to the waterway.