In a push to modernize San Francisco’s aging infrastructure, the city’s Southeast Treatment Plant (SEP) is receiving a major upgrade, part of a $3 billion investment aimed at future-proofing its wastewater systems. Built in 1952, the facility currently handles 80% of the city’s sewage and stormwater, making it a critical component of San Francisco’s infrastructure.
A key element of this project is the Biosolids Digester Facilities Project, which will replace the outdated solids treatment systems with advanced technology. The goal: reduce odors, prepare for natural disasters, improve efficiency, and make the facility more resilient against rising sea levels and other climate-related risks.
To support the project, building materials giant Cemex is supplying 50,000 cubic yards of its Vertua® lower-carbon concrete to reinforce the plant. Known for its durability, Vertua® was chosen for its ability to withstand the harsh conditions wastewater treatment facilities face, while also reducing the project’s overall carbon footprint. “With our materials, Cemex helps ensure the facility's longevity and safety while also lowering its carbon footprint,” said Francisco Rivera, Cemex U.S. Regional President.
This effort reflects San Francisco’s broader commitment to sustainability, as well as Cemex’s leadership in providing eco-friendly building materials. The company’s Future in Action program—focused on lowering carbon emissions in construction—has made strides in sustainable projects across California, including supplying materials for Los Angeles’ Sixth Street Viaduct and San Diego State University’s Snapdragon Stadium.
With the modernization of the SEP, the city is taking bold steps to secure its infrastructure for the future while addressing growing environmental concerns. Once completed, the plant will not only be more efficient but will also set a new standard for sustainable wastewater treatment facilities.
