EPA EXPORT · 13 SEP 2026FEDERAL COMPLIANCE RECORDS · NOT A HOME WATER TEST
TAP WATERLEDGERPublic system compliance records

COUNTY WATER-SYSTEM LEDGER

Cowlitz, Washington

Compare active community water systems serving this county in EPA's public export. Systems can serve multiple places, so population totals may overlap.

Systems7active CWS · pop. 2,500+
Population served111,603reported total; may overlap
Current violation flag0.0%0 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Cowlitz

Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.

Water systemPopulation servedPrimary sourceCurrent export status
Longview Water DepartmentWA534810057,617Ground waterNo current violation flagged
Kelso City OfWA533800015,775Groundwater under influence of surface waterNo current violation flagged
Beacon Hill Water & Sewer DistrictWA531565011,969Ground water purchasedNo current violation flagged
Woodland City OfWA539820010,640Groundwater under influence of surface waterNo current violation flagged
Kalama City OfWA53375508,020Groundwater under influence of surface waterNo current violation flagged
Castle Rock Municipal WaterWA53118004,367Surface waterNo current violation flagged
Toutle Community Regional WaterWA53889053,215Surface water purchasedNo current violation flagged

02 / SOURCE MIX

Ground water1 systems · 57,617 served
Groundwater under influence of surface water3 systems · 34,435 served
Ground water purchased1 systems · 11,969 served
Surface water1 systems · 4,367 served
Surface water purchased1 systems · 3,215 served
How to read the population total

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.