CITY WATER-SYSTEM LEDGER
Modesto, California
EPA’s September 2026 export lists 3 active community water systems serving Modesto, 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 Modesto, California
EPA associates 3 covered systems with Modesto, California; their reported population-served values total 242,096 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 |
|---|---|---|---|
| Modesto, City OfCA5010010 | 218,771 | Surface water purchased | No current violation flagged |
| City Of Modesto - SalidaCA5010005 | 14,537 | Surface water purchased | No current violation flagged |
| City Of WaterfordCA5010006 | 8,788 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Modesto, California
EPA classifies 3 systems serving Modesto, 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.