Nonpoint source pollution is another term for polluted runoff and other sources of water pollution that are hard to pinpoint. The term “nonpoint source pollution” comes from the Federal Clean Water Act of 1987. There, it is used as a catch-all for all kinds of water pollution that are not well-defined discharges (point sources) from wastewater plants or industries.
Many state agencies have nonpoint source (NPS) management programs that address polluted runoff. It serves as the central coordinating agency for the many NPS-related programs operated by various agencies. Minnesota for example has an established Nonpoint Source Management Program Plan.