Are You Ready for the Rainy Season?

county of san diego watershed protection program


palm tree and rain

The County of San Diego Department of Public Works (DPW), Watershed Protection Program reminds all residents to review Best Management Practices (BMPs) in preparation for the rainy season (October 1 through April 30). BMPs are techniques or controls used to prevent or reduce the discharge of pollutants into the storm drain system or waterways. Common BMPs can include:

  • Cleaning out storm drains and ditches
  • Maintaining equipment and vehicles to prevent leaks
  • Sweeping driveways, sidewalks, and outdoor paved areas
  • Adjusting irrigation systems around rain events

While implementation and maintenance of appropriate BMPs is important year-round, it becomes especially critical during the rainy season when storm activity increases the potential for polluted runoff to enter our storm drains and waterways.

DPW representatives may be visiting your area to review BMPs and ensure compliance with applicable County ordinances and State stormwater regulations. Instances of non-compliance will first result in the distribution of educational materials to the responsible properties. Repeat instances of non-compliance could result in the need to take stronger action, including administrative warnings and/or citations; however, our goal is to work with you to ensure compliance with County ordinances and State water quality regulations without the need for any stronger actions. We will gladly meet with you if you have any questions about any of these stormwater requirements.

For stormwater pollution prevention information and resources, please click here.

If you have any questions or would like to schedule an on-site meeting, please feel free to contact us at (888) 846-0800 or


Find My District


Report Stormwater Pollution
Report observed pollution to the correct jurisdiction.

Citizen Access Portal
Research property information and permits. Apply for some permits online.

GIS Maps
Find property information including zoning designation with our web-based mapping tool. 

Watershed Protection Website

Project Clean Water logo

Project Clean Water efforts are focused on providing a centralized point of access to water quality information and resources for San Diego County Watersheds. Click HERE to visit Project Clean Water’s website.