Clean Water Program LogoCity of San Mateo LogoCity of Foster City LogoCity of San Mateo Public Works Logo


The Clean Water Program is a comprehensive plan to upgrade the aging wastewater collection and treatment system with advanced infrastructure that will provide reliable services for years to come to several communities in the San Francisco Bay area, including the cities of San Mateo, Foster City, and portions of Hillsborough, Belmont, Crystal Springs County Sanitation District, and the County of San Mateo. Many of these improvements are either in design or construction. Some of the construction has been completed.

Click and zoom to see what projects are happening in your neighborhood:

Latest News

  • Wastewater Treatment Plant Virtual Community Meeting was held on June 11, 2020

    A virtual community meeting was held to share information on the construction activities for the second phase of the Wastewater Treatment Plant Upgrade and Expansion project and to describe what the community should expect.

    You can download the meeting presentation here and view the video of the meeting below.

  • Clean Water Program June 2020 Newsletter

    To see the latest updates on the Clean Water Program, check out our latest newsletter.

  • Underground Flow Equalization System EIR Approved by City Council

    On October 21, 2019, the San Mateo City Council unanimously approved the adoption of the Final Environmental Impact Report for the Underground Flow Equalization System, as well as the associated Special Use Permit and Site Plan and Architectural Review. CWP staff gave a brief informational presentation. For more information, please visit the UFES project page.

Clean Water Program

What button


Who button


When button