Water quality in Mossyrock, Washington
Mossyrock is in Lewis County. 167 active public water systems serve the county; 56 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Lewis County
50 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Harmony Park Lot Owners |
81 | 0 | 1.9 mi | |
| Lake Mayfield Community Club |
88 | 0 | 3.0 mi | |
| Lakeside Village |
94 | 0 | 3.2 mi | |
| Lakeview Terrace |
41 | 1 | 3.5 mi | |
| Mountain Lakeview 619 |
70 | 0 | 3.7 mi | |
| Mayfield Kamper Klub |
87 | 0 | 3.9 mi | |
| Lewis Co Water Sewer Dist #6 |
740 | 2 | 4.4 mi | |
| Mayfield RV Park |
165 | 2 | 4.8 mi | |
| Salkum Water Supply |
103 | 3 | 6.4 mi | |
| Cedar Villa |
32 | 1 | 8.6 mi | |
| Tilton River Mobile Home Park |
40 | 2 | 8.9 mi | |
| Morton City of |
2,147 | 1 | 10.0 mi | |
| Lewis CO Water Dist #2 |
1,983 | 0 | 11.6 mi | |
| Rom 626 |
74 | 1 | 13.7 mi | |
| Middle Fork Water & Sewer |
144 | 0 | 14.4 mi | |
| Jackson Mobile 2 |
30 | 1 | 15.8 mi | |
| Cowlitz Indian Tribal Housing |
52 | 1 | 16.5 mi | |
| Redmon Mobile Home Park |
105 | 0 | 17.5 mi | |
| Valley Meadows 240 |
148 | 0 | 17.9 mi | |
| Toledo Municipal |
1,944 | 1 | 18.1 mi | |
| Winston Creek RV Park |
50 | 0 | 18.2 mi | |
| Frost Road Park |
65 | 1 | 18.3 mi | |
| Silverbrook MH & RV |
42 | 0 | 18.7 mi | |
| Gunderson Water Works |
53 | 0 | 19.7 mi | |
| Newaukum Ventures |
186 | 1 | 19.9 mi |
Non-community systems in Lewis County (116: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Lewis County, nearest to Mossyrock 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.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.