“Nonpoint sources” means pollution sources that are diffuse by nature, in that the pollution emitted does not normally enter the environment by discrete conveyances as do point sources. Nonpoint sources of pollution potentially result from activities associated with agriculture, silviculture, mining of sand and gravel, urban storm runoff, urban and rural construction, subsurface disposal systems, deicing salts from highways, and sludge, septage, and solid waste disposal on the land.

Source. (See Revision Note #1 at chapter heading for Env-Sw 100) #8460-B, eff 10-28-05 (from Env-Sw 103.52); ss by #14103, effective 10-23-24 (formerly Env-Sw 103.53) (see Revision Note #2 at chapter heading for Env-Sw 100)