Water quality for ZIP code 98537
ZIP 98537 covers Cosmopolis in Grays Harbor County, Washington, one of 20 ZIP codes in the county. 87 active public water systems serve the county; 31 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Grays Harbor County
34 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Montesano City of |
6,204 | 0 | 10.4 mi | |
| Grays Harbor CO Water Dist 2 |
5,112 | 1 | 10.6 mi | |
| Cosmopolis Water Department |
1,812 | 2 | 11.7 mi | |
| Elma City of |
6,638 | 1 | 14.9 mi | |
| Aberdeen City of |
22,867 | 1 | 14.9 mi | |
| Greenwood Mobile Home Park |
350 | 2 | 15.3 mi | |
| Malone |
181 | 0 | 15.5 mi | |
| Vikings West Mobile Home |
71 | 2 | 16.6 mi | |
| Oakville City of |
1,325 | 0 | 17.3 mi | |
| Hoquiam Water Department |
11,456 | 0 | 17.6 mi | |
| Meadowood Development |
220 | 1 | 17.8 mi | |
| Rls 1 |
38 | 0 | 19.2 mi | |
| Harbor Mobile Estates |
72 | 0 | 19.8 mi | |
| Forestview Senior Community LLC |
92 | 0 | 20.6 mi | |
| Illahee Oyehut |
971 | 0 | 21.2 mi | |
| Ocosta Mobile Home Park LLC |
26 | 4 | 21.6 mi | |
| Bay City Properties |
90 | 0 | 21.8 mi | |
| McCleary City of |
2,753 | 0 | 21.9 mi | |
| Grays Harbor CO Water Dist 1 |
1,302 | 0 | 23.4 mi | |
| Pit Water CO 328 |
48 | 0 | 23.6 mi | |
| Westport Water Department |
5,346 | 1 | 23.9 mi | |
| Ocean Shores Water Dept |
9,347 | 0 | 28.1 mi | |
| Hogans Corner |
1,458 | 1 | 29.6 mi | |
| Ocean City |
237 | 1 | 31.4 mi | |
| Sea View |
170 | 2 | 32.6 mi |
Non-community systems in Grays Harbor County (52: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Grays Harbor 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.