Water quality in Ocosta, Washington
Ocosta is in Grays Harbor 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 |
|---|---|---|---|---|
| Bay City Properties |
90 | 0 | 1.9 mi | |
| Westport Water Department |
5,346 | 1 | 3.2 mi | |
| Grays Harbor CO Water Dist 1 |
1,302 | 0 | 6.0 mi | |
| Harbor Mobile Estates |
72 | 0 | 7.7 mi | |
| Ocean Shores Water Dept |
9,347 | 0 | 8.5 mi | |
| Hoquiam Water Department |
11,456 | 0 | 10.0 mi | |
| Hogans Corner |
1,458 | 1 | 12.2 mi | |
| Aberdeen City of |
22,867 | 1 | 12.7 mi | |
| Cosmopolis Water Department |
1,812 | 2 | 13.2 mi | |
| Ocean City |
237 | 1 | 14.1 mi | |
| Sea View |
170 | 2 | 15.8 mi | |
| Haven by the Sea |
308 | 1 | 16.9 mi | |
| Grays Harbor CO Water Dist 2 |
5,112 | 1 | 17.0 mi | |
| Paradise Water Assoc |
74 | 0 | 17.2 mi | |
| Illahee Oyehut |
971 | 0 | 17.7 mi | |
| Monte View Estates |
200 | 1 | 18.7 mi | |
| Iron Springs Park |
62 | 0 | 20.1 mi | |
| Montesano City of |
6,204 | 0 | 21.6 mi | |
| Pacific Beach/moclips |
2,372 | 2 | 24.0 mi | |
| Elma City of |
6,638 | 1 | 30.4 mi | |
| Greenwood Mobile Home Park |
350 | 2 | 32.0 mi | |
| Vikings West Mobile Home |
71 | 2 | 32.4 mi | |
| Meadowood Development |
220 | 1 | 33.4 mi | |
| Malone |
181 | 0 | 33.8 mi | |
| Rls 1 |
38 | 0 | 34.8 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, nearest to Ocosta 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.