The Wastewater Enterprise operates and maintains 993 miles of combined sewers, which collect sanitary sewage from homes, businesses, and street runoff; storage facilities; and three treatment plants that treat both sanitary sewage and stormwater to protect public health and the San Francisco Bay and Pacific Ocean.
San Francisco is the only major city in California that operates a city-wide combined sewer system. Our facilities and many programs have received both state and national recognition from agencies like the U.S. Environmental Protection Agency, National Association of Clean Water Agencies and California Water Environment Association.