Nonpoint Source Pollution is water quality's number one threat. Nonpoint source pollution is caused by rainfall or snow melt moving over and through the ground, picking up natural and man-made pollutants.
Sediment from improperly managed construction sites, crop and forest lands, and eroding stream banks
Bacteria and nutrients from livestock, pet wastes and faulty septic systems
Excess fertilizers, herbicides and insecticides from agricultural lands and residential areas