COUNTY WATER-SYSTEM LEDGER
Marin, California
EPA’s September 2026 export lists 3 active community water systems serving Marin, 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 Marin, California
EPA associates 3 covered systems with Marin, California; their reported population-served values total 267,033 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 |
|---|---|---|---|
| Marin Municipal Water DistrictCA2110002 | 186,895 | Surface water | No current violation flagged |
| North Marin Water DistrictCA2110003 | 61,691 | Surface water | No current violation flagged |
| Nps GgnraCA2110350 | 18,447 | Surface water purchased | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Marin, California
EPA classifies 3 systems serving Marin, California across 2 primary-source categories; Surface water 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.