Skip to page body Home Customer Service How To Environment Projects & Programs About Us

Sewer System Improvement Program

For the past 100 years, the City of San Francisco has protected public health by operating a sewer system that reliably treats and disposes of sewage and street runoff to the Bay and Pacific Ocean.

The SSIP is the culmination of several years of wastewater system planning efforts, public meetings, and SFPUC Commission workshops, to develop proposed improvements to address the following challenges:


    System Challenges

Aging Infrastructure
Seismic Vulnerability   Climate Change Impacts
Aging Infrastructure
Over 60% of San Francisco sewer pipes are over 80 years old and the system gets overwhelmed during heavy rains.
Seismic Vulnerability
Our sewer system was not built to withstand a major earthquake and facilities are seismically vulnerable. 
Climate Change
The increasing intensity and frequency of storms can overwhelm our system and contribute to flooding. 

odor control
Grey Green Clean photos
flood barriers
Odor Control
Odors can be a problem when aging equipment malfunctions and during dry weather.
Water Quality

Continue to reduce combined sewer discharges to help improve water quality in the Bay and Ocean.

  Localized Flooding
Stormwater runoff can overwhelm our system during heavy rains and lead to neighborhood flooding.
To learn more about the Sewer System Improvement Program, view our Overview page.



Ways to protect YOUR Sewer System

We work 24 hours a day, seven days a week treating everything that goes down your drain. Do your part to protect our sewer system and learn more at the resources below. We invite you to experience a green infrastructure project up close and personal, follow us on social media, and see the wastewater system in action during a tour of our treatment plants!
clarifier at SEP
Learn About the Sewer System
adopt a drain crop
Adopt A Drain

children gardening
Stewardship Grants

Last updated: 8/6/2019 10:59:07 AM