SFPUC Southeast Outfall Diffuser Repair Project

The project involves maintenance and repair work on the Southeast Outfall (SEO) diffuser system located beneath Pier 80 at the Port of San Francisco, extending into San Francisco Bay. This outfall serves as the primary discharge point for treated effluent from the Southeast Water Pollution Control Plant, one of three wastewater treatment facilities serving the City and County of San Francisco. The SEO discharges secondary-treated effluent during dry weather, with a capacity of 150 million gallons per day, and is regulated under a 2013 NPDES permit issued by the San Francisco Bay Regional Water Quality Control Board. The Permittee, responsible for operating and maintaining San Francisco’s combined sewer system, will remove accumulated sediment and rip rap obscuring parts of the diffuser pipes and repair or replace damaged or missing diffusers to restore full system functionality. The work is critical to ensuring continued compliance with water quality standards and preventing environmental degradation in the Bay. The project is forecasted for execution with a posted date of July 10, 2026, and is overseen by the Regional Water Quality Control Board, Region 2 – San Francisco Bay, with Nathaniel Goetz designated as the primary point of contact. Location specifics include coordinates 37.749618 latitude and -122.373471 longitude, and all activities will occur within the City and County of San Francisco. The project supports long-term infrastructure resilience and regulatory adherence for the city’s wastewater management system.