Water quality for ZIP code 98603
Cowlitz County, Washington, one of 10 ZIP codes in the county. 77 active public water systems serve the county; 23 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Cowlitz County
30 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Merwin Village/park Ppl CO |
92 | 0 | 9.9 mi | |
| Lewis River Golf Course |
300 | 0 | 14.2 mi | |
| Lewis River RV Park |
347 | 0 | 14.8 mi | |
| Sandwood Heights Subdivision |
126 | 0 | 17.3 mi | |
| High Ridge |
73 | 0 | 17.6 mi | |
| Peterson Farms |
290 | 0 | 18.2 mi | |
| Davis Terrace Water Assn |
222 | 2 | 18.7 mi | |
| Woodland City of |
10,640 | 0 | 18.8 mi | |
| Owl Creek |
102 | 0 | 19.5 mi | |
| Tulip Meadows |
33 | 2 | 19.6 mi | |
| Kalama City of |
8,020 | 0 | 20.1 mi | |
| Columbia Riverfront RV Park |
233 | 1 | 21.1 mi | |
| Carrolls Water Assn |
449 | 0 | 21.3 mi | |
| Kelso City of |
15,775 | 0 | 23.3 mi | |
| Toutle River View |
45 | 1 | 23.9 mi | |
| Toutle Community Regional Water |
3,215 | 2 | 24.1 mi | |
| Pleasant Hill Terrace Subdivision |
30 | 0 | 24.2 mi | |
| Beacon Hill East |
190 | 0 | 24.4 mi | |
| Beacon Hill Water & Sewer District |
11,969 | 0 | 26.3 mi | |
| Castle Rock Municipal Water |
4,367 | 2 | 27.8 mi | |
| Longview Water Department |
57,617 | 1 | 28.3 mi | |
| Camelot Subdivision |
142 | 1 | 28.7 mi | |
| Ryderwood Improvement & Service AS |
434 | 1 | 37.5 mi | |
| Paradise Cove Resort & RV Park |
59 | 0 | 40.4 mi | |
| Viking Village Mobile Home Park |
25 | 0 | 45.3 mi |
Non-community systems in Cowlitz County (46: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Cowlitz County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
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.