Sanitary Sewer & Septic System Information

Press Enter to show all options, press Tab go to next option
WBSD logoWest Bay Sanitary District provides wastewater collection and conveyance services to Menlo Park, Atherton, and Portola Valley, and areas of East Palo Alto, Woodside and unincorporated San Mateo and Santa Clara counties. The District conveys raw wastewater, via the Menlo Park Pump Station and force main, to South Bayside Systems Authority (SBSA) for treatment and discharge to the San Francisco Bay.

For service questions, complaints, or inquiries about their sewer projects and pump facilities, please visit, call (650) 321-0384, or email at

For questions relating to septic systems, please refer to San Mateo County Environmental Health or call (650) 372-6200.