Visit the Watershed Management Division Website to learn more about the Municipal National Pollutant Discharge Elimination System (NPDES) Permit, Low Impact Development (LID) Manual, the County's Stormwater Ordinance, watersheds, and related items.

The Stormwater & Runoff Pollution Control Program tracks industrial and commercial businesses in the unincorporated County area to determine compliance with the provisions of the Municipal National Pollutant Discharge Elimination System (NPDES) Permit issued by the California Regional Water Quality Control Board, Los Angeles Region.

Visit the Stormwater Pollution Prevention Website, see the “Don’t Trash California” campaign, and get more information on keeping our neighborhoods, oceans, and local waterways clean.

Contact your local Stormwater Coordinator to report a clogged storm drain, request storm drain stenciling, and learn about what your city is doing to improve water quality.

To report illegal dumping/discharges, anywhere in Los Angeles County, into the storm drain system, call 1(888)CLEAN LA, 24 hours per day.

What you can do to prevent pollution of our neighborhoods and beaches.

Have an RV? Find a site for the safe disposal of RV sewage in Los Angeles County (en Español).