COUNTY WATER-SYSTEM LEDGER
Cowlitz, Washington
EPA’s September 2026 export lists 7 active community water systems serving Cowlitz, 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 Cowlitz, Washington
EPA associates 7 covered systems with Cowlitz, Washington; their reported population-served values total 111,603 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 |
|---|---|---|---|
| Longview Water DepartmentWA5348100 | 57,617 | Ground water | No current violation flagged |
| Kelso City OfWA5338000 | 15,775 | Groundwater under influence of surface water | No current violation flagged |
| Beacon Hill Water & Sewer DistrictWA5315650 | 11,969 | Ground water purchased | No current violation flagged |
| Woodland City OfWA5398200 | 10,640 | Groundwater under influence of surface water | No current violation flagged |
| Kalama City OfWA5337550 | 8,020 | Groundwater under influence of surface water | No current violation flagged |
| Castle Rock Municipal WaterWA5311800 | 4,367 | Surface water | No current violation flagged |
| Toutle Community Regional WaterWA5388905 | 3,215 | Surface water purchased | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Cowlitz, Washington
EPA classifies 7 systems serving Cowlitz, Washington across 5 primary-source categories; Ground water is the largest category with 1 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.