Annual & Triennial Water Quality Reports
We are dedicated to protecting and maintaining your water quality.
Our water system is fortunate to have some of the best water in the U.S. Our major water source is the well-protected Tuolumne Watershed, where spring snowmelt flows from the Tuolumne River into Hetch Hetchy Reservoir. We rigorously protect and test the quality of your water to ensure that it meets or exceeds all federal and state standards for health.
Read Our Annual Water Quality Report for San Francisco (2025)
Humiling ng kopya ng ulat sa kalidad ng tubig para sa 2025
Solicite una copia del informe de calidad del agua de 2025
Read Our Annual Water Quality Reports for other Local and Regional Systems
- Annual Water Quality Report - San Francisco Regional System (2025)
- Annual Water Quality Report - Treasure Island (2025)
- Annual Water Quality Report - Town of Sunol (2025)
Water Monitoring Analytes for 2025 - Coming Soon