County · Washington
Grays Harbor County, Washington: drinking water records
This overview covers 20 ZIP codes and 41 community water systems in Grays Harbor County. It also stands in for 3 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Westport Water Department WA5395300 | 5,346 | 180 | 0 | 4 | 2.9 ppb |
| Aberdeen City of WA5300050 | 22,867 | 120 | 0 | 0 | 0 ppb |
| Hoquiam Water Department WA5334350 | 11,456 | 120 | 0 | 0 | 1.2 ppb |
| Ocean Shores Water Dept WA5363008 | 9,347 | 60 | 0 | 0 | 0 ppb |
| Elma City of WA5323100 | 6,638 | 120 | 0 | 0 | 1.4 ppb |
| Montesano City of WA5356000 | 6,204 | 120 | 0 | 0 | 3.6 ppb |
| Grays Harbor Co Water Dist 2 WA5329250 | 5,112 | 60 | 0 | 0 | 6.4 ppb |
| Taholah 105300018 | 1,600 | 0 | 0 | 4 | 1 ppb |
| Qui Nai Elt Village 105300133 | 207 | 0 | 0 | 2 | 0.8 ppb |
| Queets 105300017 | 200 | 0 | 0 | 10 | 0 ppb |
| Sea View WA5307314 | 170 | 0 | 0 | 1 | 0.5 ppb |
| Olympic Park Trailer Court 105300086 | 169 | 0 | 0 | 1 | 0 ppb |
| Vosper Place Subdivision 105338111 | 68 | 0 | 0 | 1 | 1.4 ppb |
| Mccleary City of WA5352250 | 2,753 | 0 | 0 | 0 | 2 ppb |
| Pacific Beach/Moclips WA5300333 | 2,372 | 0 | 0 | 0 | 2.1 ppb |
| Cosmopolis Water Department WA5315050 | 1,812 | 0 | 0 | 0 | 1.2 ppb |
| Hogans Corner WA53AA554 | 1,458 | 0 | 0 | 0 | 7 ppb |
| Oakville City of WA5362750 | 1,325 | 0 | 0 | 0 | 6.2 ppb |
| Grays Harbor Co Water Dist 1 WA5329200 | 1,302 | 0 | 0 | 0 | 0 ppb |
| Lake Quinault WA5370350 | 1,003 | 0 | 0 | 0 | 10.5 ppb |
| Illahee Oyehut WA5335450 | 971 | 0 | 0 | 0 | 3 ppb |
| Greenwood Mobile Home Park WA5329816 | 350 | 0 | 0 | 0 | 0 ppb |
| Haven By the Sea WA5331820 | 308 | 0 | 0 | 0 | 3.1 ppb |
| Ocean City WA5301088 | 237 | 0 | 0 | 0 | 7.4 ppb |
| Neilton Meadowland WD 8 a WA5358750 | 222 | 0 | 0 | 0 | 2.5 ppb |
ZIP reports in Grays Harbor County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 98550, 98552, 98583.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.