Polluted Runoff: Nonpoint Source (NPS) Pollution

 New NPS National Program Guidelines are now available.

The national NPS Program has released revised Guidelines to take effect FY25. For more information, clickhere.

Explore

Navigate directly to theNPS Project Explorer or enter a location in the widget below to learn about nonpoint source projects in the U.S. 

Nonpoint Source pollution is...

caused by rainfall or snowmelt moving over and through the ground. As the runoff moves, it picks up and carries away natural and human-made pollutants, depositing them into lakes, rivers, wetlands, coastal waters, and ground waters.

Learn About NPS Pollution

Getting Started with the NPS Program!

Learn more about how states, Tribes, and territories are working to address NPS pollution.

Who to Talk to in Your Area

Contact Us about Nonpoint Source Pollution to ask a question, provide feedback, or report a problem.
Last updated on December 11, 2025