County · Oregon
Umatilla County, Oregon: drinking water records
This overview covers 13 ZIP codes and 32 community water systems in Umatilla County. It also stands in for 1 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 |
|---|---|---|---|---|---|
| Hermiston, City of OR4100372 | 20,000 | 327 | 5 | 0 | 3 ppb |
| Pendleton, City of OR4100613 | 16,996 | 240 | 1 | 0 | 2.5 ppb |
| Umatilla, City of OR4100914 | 8,256 | 180 | 0 | 0 | 0 ppb |
| Milton-Freewater, City of OR4100522 | 7,145 | 180 | 2 | 0 | 2 ppb |
| Ctuir Pwd Mission 104111101 | 1,310 | 0 | 0 | 1 | 0 ppb |
| Athena, City of OR4100064 | 1,238 | 0 | 0 | 2 | 1.8 ppb |
| Ukiah, City of OR4100913 | 235 | 0 | 0 | 1 | 0 ppb |
| Helix, City of OR4100368 | 190 | 0 | 0 | 2 | 0 ppb |
| Hat Rock Water Company OR4101309 | 150 | 0 | 0 | 2 | 0 ppb |
| Chart Subdivision OR4101415 | 125 | 0 | 0 | 1 | 0 ppb |
| North Hill Water Corporation OR4100374 | 100 | 0 | 0 | 2 | 0 ppb |
| Vincent Water Company OR4100521 | 90 | 0 | 0 | 1 | 1.7 ppb |
| Desire for Healing, INC OR4101330 | 33 | 0 | 0 | 2 | 1 ppb |
| Stanfield, City of OR4100842 | 2,115 | 0 | 0 | 0 | 2 ppb |
| Pilot Rock, City of OR4100626 | 1,326 | 0 | 0 | 0 | 0 ppb |
| Weston, City of OR4100949 | 714 | 0 | 0 | 0 | 0 ppb |
| Echo, City of OR4100270 | 632 | 0 | 0 | 0 | 0 ppb |
| Adams Water Dept, City of OR4100001 | 400 | 0 | 0 | 0 | 2 ppb |
| Vista Home Park OR4101099 | 300 | 0 | 0 | 0 | 5 ppb |
| Charles Tracts Water Company OR4100371 | 290 | 0 | 0 | 0 | 1.9 ppb |
| Green Acres MHP - Umatilla Co OR4100523 | 200 | 0 | 0 | 0 | 2 ppb |
| Country Squire Estates OR4101045 | 150 | 0 | 0 | 0 | 3 ppb |
| Rieth Water District OR4100617 | 150 | 0 | 0 | 0 | 1 ppb |
| Heritage Improvement District OR4100615 | 125 | 0 | 0 | 0 | 0 ppb |
| Shady Rest Mobile Court OR4101214 | 110 | 0 | 0 | 0 | 2 ppb |
ZIP reports in Umatilla 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: 97859.
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.