county of san diego watershed protection program


Cost Tool


The County of San Diego has updated the Unit and Maintenance Cost Tool for Structural (Best Management Practices)  BMPs and Significant Site Design BMPs.  This new tool provides the ability to compare relative BMP unit costs and maintenance costs based on their components.  The tool has been updated based on the County of San Diego BMP Design Manual dated January 1, 2019.  Each BMP worksheet includes the minimum components listed in the County of San Diego 2019 BMP Design Manual for the specific BMP type. The BMPs in this tool include, but are not limited to:

  • Tree Wells
  • Dispersion Areas
  • Permeable Pavement
  • Biofiltration BMPs


The new Unit and Maintenance Cost Tool is available to download here: Unit and Maintenance Cost Tool. It can also be found under Cost Tools in the Development Resources page under


The County is home to 11 westward draining watersheds. Can you identify the watershed you live, work and recreate in? Click on this link and enter your address into the search bar on the top right corner of this map to discover which is your watershed! (Your address will not be recorded). This tool can also be found under Watersheds of SD County in the Development Resources page under

Find Your Watersehd



The County of San Diego is developing a Green Streets Master Plan (GSMP) to identify multi-benefit green street opportunities within the population centers in the western draining watersheds of the unincorporated County.

Green streets are projects that implement green infrastructure BMPs within the County’s road right-of-way (ROW) to capture, slow, and filter stormwater. These BMPs are designed to treat runoff from impervious areas such as streets, sidewalks, and adjacent land areas. When integrated with complete streets and within development projects, they create additional urban greening and support walking, biking, and transit use, which in-turn supports healthy, thriving communities.

The GSMP will identify retrofit project opportunities that have been screened for technical feasibility and evaluated to maximize potential water quality and community benefits. Each project will be assessed based on environmental, social and economic benefits and assigned a ranking to help guide and prioritize project implementation. A virtual workshop to gather initial public input is scheduled for Wednesday, July 7th at 5:30 pm. More information can be found here or under

Are you interested in seeing how the County of San Diego is implementing green infrastructure? Visit our Green infrastructure web page and check out the fact sheets on the green infrastructure and water quality improvement projects that are either in construction or in the design phase and sign up for the Green Infrastructure Newsletter to stay informed on our progress to improve water quality.




Are you looking to get the County to sign off on your newly-constructed Structural BMPs? If so, make sure we can see that your BMPs are constructed in compliance with construction plans and BMP performance standards. Take lots of photos, both during and after construction, to show that all of your BMP elements have been installed correctly.

The County’s BMP Installation Verification Photo Guidance can help you figure out what needs to be photographed and will show you how to properly label your BMP photos. Give it a read before you complete your BMP Installation Verification Form…or better yet, before your BMPs go to construction! The Photo Guidance can be found under Submittal Templates in the Development Resources page under


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


New Project Clean Water

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. 

To learn more about the County of San Diego - Watershed Protection Program, please visit