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Biosolids Digester Facilities Project

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Current Project Timeline
March 2018: SFPUC Commission Approval
July 2018: WIFIA Loan Approval
August 2019: Notice to Proceed for Construction
March 2020: Demolition and site preparation

Summer 2019:Design Complete
Fall 2019: Construction Commenced
Summer 2025: Estimated End of Construction
Summer 2026: Facility Start-Up
BDFP Render from Jerrold
Rendering of future Digester Facilities looking north over Jerrold Avenue

Built in 1952 in Bayview-Hunters Point, the Southeast Treatment Plant is the City’s largest wastewater treatment facility, but many of its facilities are past their useful life and generate odors that impact the neighborhood. The Sewer System Improvement program (SSIP) projects at the SEP focus on making the plant smell better, look better, operate more efficiently, and protect our critical equipment in the event of an earthquake

On March 13, 2018, the SFPUC Commission approved the Biosolids Digester Facilities Project (BDFP) which will replace and relocate the outdated existing solids treatment facilities with more reliable, efficient, and modern technologies and facilities that will help transform the plant into a modern resource recovery facility, a City destination, a proud neighborhood asset, and an attractive workplace. In addition, the project will locate the new digesters farther away from existing residences, reduce odors, make visual improvements in and around the plant, and allow us to meet our Levels of Service goals. 

For more information about construction activities at the Southeast Treatment Plant, visit

BDFP New Digesters
BDFP Pretreatment Facility
BDFP Recovery Building
New digesters Pretreatment facility Energy recovery building

Project Objectives

  • Address aging infrastructure – construct new modern, proven and efficient treatment technologies
  • Improve odor, noise, and visual quality
  • Improve seismic reliability
  • Beneficially use 100% of biosolids and biogas produced
  • Maintain regulatory compliance
  • Build critical processes with redundant infrastructure to provide reliability and operational flexibility
Learn more about how the Southeast Treatment Plant operates 24/7 to keep our community and environment clean! Get involved and help us protect our sewer system! 

Eager to visit the Southeast Treatment Plant to see how it operates?

Our Wastewater Treatment Plant Tours are currently on hold due to the extensive construction underway. Learn about our amazing sewer system by watching some of our exciting videos at Get involved and help us protect our sewer system! Learn ways to keep our city clean and green.


legacy screen
Take a sneak peek at the innovative new technology being installed, along with a host of brand new features the SFPUC, in close collaboration with our valued community and neighborhood residents, has envisioned for the largest and most important wastewater facility in San Francisco.

About the SSIP

The San Francisco Public Utilities Commission (SFPUC) recently launched the Sewer System Improvement Program (SSIP), a 20-year citywide investment to upgrade our aging sewer system and provide a more reliable, sustainable, and seismically safe system now and for future generations. The SSIP includes a series of facility upgrades at the Southeast Treatment Plant (SEP) located in the Bayview neighborhood of San Francisco. Click here to learn more about the SSIP or for information on upcoming meetings, visit

Sign up to receive regular email updates about construction impacts near SEP, or learn about upcoming activities through the Southeast Community Facility Commission meetings at 1800 Oakdale Avenue every fourth Wednesday of the month beginning at 6:00 p.m.


Last updated: 1/20/2021 7:51:46 AM