Definitions for "Nonpoint Sources"
Ill-defined runoff that enters waterways.
Scattered, diffuse sources of pollutants such as runoff from farm fields, golf courses, construction sites, etc.
Pollution sources that are diffuse and do not have a single point of origin or are not introduced into a receiving stream from a specific outlet. The pollutants are generally carried off the land by storm water runoff. Sources of NPS pollution include runoff from agriculture, silviculture, urban development, mining, construction, dams and channels, inappropriate land disposal of waste, marinas, and saltwater intrusion.
Water pollutionwhich is not traceable to any discrete or identifiable facility but comes from a broad treatment area.