Washington
Cowlitz County drinking water quality
77 active public water systems serve 125,351 people in Cowlitz County. 54 are compliant, 23 had at least one EPA violation in the past three years, 0 are designated serious violators, and 1 carries a health flag.
Needs attention
Community water systems
31 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Longview Water Department |
57,617 | 1 | 0 | |
|
Kelso City of |
15,775 | 0 | 0 | |
|
Beacon Hill Water & Sewer District |
11,969 | 0 | 0 | |
|
Woodland City of |
10,640 | 0 | 0 | |
|
Kalama City of |
8,020 | 0 | 0 | |
|
Castle Rock Municipal Water |
4,367 | 2 | 0 | |
|
Toutle Community Regional Water |
3,215 | 2 | 0 | |
|
Carrolls Water Assn |
449 | 0 | 0 | |
|
Ryderwood Improvement & Service AS |
434 | 1 | 0 | |
|
Lewis River RV Park |
347 | 0 | 0 | |
|
Lewis River Golf Course |
300 | 0 | 0 | |
|
Cougar Crest |
290 | 0 | 0 | |
|
Peterson Farms |
290 | 0 | 0 | |
|
Columbia Riverfront RV Park |
233 | 1 | 0 | |
|
Davis Terrace Water Assn |
222 | 2 | 0 | |
|
Beacon Hill East |
190 | 0 | 0 | |
|
Camelot Subdivision |
142 | 1 | 0 | |
|
Sandwood Heights Subdivision |
126 | 0 | 0 | |
|
Owl Creek |
102 | 0 | 0 | |
|
Mulkey Meadows 1 |
93 | 0 | 0 | |
|
Merwin Village/park Ppl CO |
92 | 0 | 0 | |
|
High Ridge |
73 | 0 | 0 | |
|
Edgewater Mobile Estates |
70 | 0 | 0 | |
|
Paradise Cove Resort & RV Park |
59 | 0 | 0 | |
|
Columbia Crest Estates |
48 | 0 | 0 | |
|
Kelley Crest |
45 | 2 | 1 | |
|
Toutle River View |
45 | 1 | 0 | |
|
Tulip Meadows |
33 | 2 | 0 | |
|
Pleasant Hill Terrace Subdivision |
30 | 0 | 0 | |
|
Viking Village Mobile Home Park |
25 | 0 | 0 | |
|
Hazel Dell Mobile Park |
24 | 1 | 0 |
Non-community systems (46: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (75, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Washington records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.