National Pollutant Discharge Elimination System (NPDES) San Diego Region

As authorized by the Clean Water Act, the NPDES Permit Program controls water pollution by regulating point sources that discharge pollutants into waters of the United States. Point sources are discrete conveyances such as pipes or man-made ditches. Examples of pollutants include, but are not limited to, rock, sand, dirt, and agricultural, industrial, and municipal waste discharged into waters of the United States. See section 122.2 of 40 Code of Federal Regulations for the definitions of point source, pollutant, and water of the United States.

The NPDES Program is a federal program which has been delegated to the State of California for implementation through the State Water Resources Control Board (State Water Board) and the nine Regional Water Quality Control Boards (Regional Water Boards), collectively Water Boards. In California, NPDES permits are also referred to as waste discharge requirements (WDRs) that regulate discharges to waters of the United States

If a facility discharges pollutants from a point source to a surface water of the United States, it needs a National Pollutant Discharge Elimination System (NPDES) permit.

Additional NPDES Permitting Program application information:

  • State Water Board NPDES Webpage - The State Water Board NPDES webpage contains links to statewide NPDES general permits, a description of the NPDES permitting process, and other information regarding the implementation of the NPDES program in the State of California.
  • U.S. Environmental Protection Agency (USEPA) NPDES Webpage - The USEPA NPDES webpage contains basic information about the NPDES permit program, and applicable federal regulations, including pretreatment and biosolids regulations.

San Diego Water Board Contacts