COUNTY WATER-SYSTEM LEDGER
Lewis, Washington
EPA’s September 2026 export lists 4 active community water systems serving Lewis, Washington, 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 Lewis, Washington
EPA associates 4 covered systems with Lewis, Washington; their reported population-served values total 46,479 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 |
|---|---|---|---|
| Centralia Public Works - WaterWA5312200 | 28,164 | Ground water | No current violation flagged |
| Chehalis Water DepartmentWA5312250 | 11,718 | Surface water | No current violation flagged |
| Winlock City OfWA5397500 | 3,502 | Ground water | No current violation flagged |
| Napavine City OfWA5358200 | 3,095 | Ground water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Lewis, Washington
EPA classifies 4 systems serving Lewis, Washington 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.