The new Treasure Island Water Resource Recovery Facility project in San Francisco will replace aging infrastructure and meet the bay area’s wastewater and recycled water needs of the future. Originally constructed in 1961, the existing plant has become unreliable with outdated process equipment. The design-build new facility will treat 1.3 million gallons of water per day for the cities of Treasure Island and adjacent Yerba Buena.

The significance of this San Francisco Public Utilities Commission project extends beyond the immediate need for upgraded infrastructure. The island is projected to gain 20,000 residents by 2032 – eight times its current population, and this new facility will play a crucial role in meeting the wastewater treatment demands of this expanded community. It will produce minimal wastewater discharge by reusing disinfected recycled water for irrigation, lawns, landscaping, and community parks.

This state-of-the-art facility will replace the existing plant and include a range of advanced processes to ensure efficient and effective treatment. Project scope elements for the new

treatment facility include a liquid and solid stream comprised of coarse screens, potential grit removal, fine screens, a membrane bioreactor and ultraviolet disinfection. Additional features in support of the facility include reclaimed water pumping, wetlands, stormwater pipe discharge, aerated solids holding tank, solids thickening and an operations and maintenance building. Emphasizing both functionality and security, the project also features a perimeter wall, stormwater handling measures and site security enhancements.

Aligned with the Envision® Sustainable Infrastructure Framework, this project sets ambitious goals related to neighborhood outreach, waste reduction, habitat restoration, and emissions and energy reduction. The San Francisco Public Utilities Commission aims to achieve Envision Gold Verification for the new facility, demonstrating a commitment to sustainable practices and community stewardship.

The Treasure Island Water Resource Recovery Facility represents a significant stride towards a greener future, with improved aesthetics, increased capacity and advanced treatment processes. The upgraded facility will offer reliable, high-quality service to all who live, work, and play on Treasure Island and Yerba Buena Island, ensuring a sustainable water future for generations to come.

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