COUNTY WATER-SYSTEM LEDGER
San Francisco, California
EPA’s September 2026 export lists 3 active community water systems serving San Francisco, California, with 0 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving San Francisco, California
EPA associates 3 covered systems with San Francisco, California; their reported population-served values total 855,383 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Sfpuc City Distribution DivisionCA3810011 | 848,019 | Surface water purchased | No current violation flagged |
| Treasure IslandCA3810702 | 3,864 | Surface water purchased | No current violation flagged |
| Presidio Of San FranciscoCA3810700 | 3,500 | Surface water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for San Francisco, California
EPA classifies 3 systems serving San Francisco, California across 2 primary-source categories; Surface water purchased is the largest category with 2 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.