COUNTY WATER-SYSTEM LEDGER
Siskiyou, California
EPA’s September 2026 export lists 4 active community water systems serving Siskiyou, California, with 4 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 Siskiyou, California
EPA associates 4 covered systems with Siskiyou, California; their reported population-served values total 16,919 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 |
|---|---|---|---|
| Yreka, City OfCA4710011 | 7,825 | Surface water | Current health-based flag |
| Mt. Shasta, City OfCA4710008 | 3,642 | Ground water | Current health-based flag |
| Lake Shastina C.S.DCA4710013 | 2,790 | Ground water | Current health-based flag |
| Weed, City OfCA4710009 | 2,662 | Ground water | Current monitoring/reporting flag |
02 / SOURCE MIX
Primary water sources for Siskiyou, California
EPA classifies 4 systems serving Siskiyou, California across 2 primary-source categories; Ground water is the largest category with 3 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.