PFAS · Oregon
PFAS in Oregon drinking water: EPA’s final survey results
EPA’s national PFAS survey (UCMR 5) tested 123 of the community water systems that serve homes in Oregon. 17 found at least one of 29 PFAS above the laboratory reporting level, and 9 had a PFOA or PFOS sampling-location yearly average at or above EPA’s 4.0 ppt limit. Samples were collected from January 2023 to June 2026.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
PFOS was the compound Oregon community systems found most often: 8 of 123 tested systems measured it above the reporting level. Across the country, 35% of surveyed community systems found at least one PFAS; in Oregon the share is 14%. The largest Oregon system with a detection, Bend, City of, serves 77,704 people and found 4 of the 29 compounds.
Which PFAS were found most often in Oregon
Each row counts the Oregon community water systems where that compound was measured above the reporting level at least once. A detection is a measurement, not a violation: most of these compounds have no federal limit.
| Compound | Systems where found | Systems tested | Share |
|---|---|---|---|
| PFOS | 8 | 123 | 7% |
| PFHxS | 6 | 123 | 5% |
| PFBS | 5 | 123 | 4% |
| PFHxA | 3 | 123 | 2% |
| PFOA | 3 | 123 | 2% |
| PFPeA | 3 | 123 | 2% |
| 6:2 FTS | 2 | 123 | 2% |
| PFBA | 2 | 123 | 2% |
| PFHpA | 2 | 123 | 2% |
| 8:2 FTS | 1 | 123 | 1% |
Oregon systems with the most PFAS found
The 10 surveyed community water systems that found the most different PFAS, with PFOA and PFOS compared to EPA’s 4.0 ppt limits on the yearly average at the highest sampling location. Larger systems come first when counts tie.
| Water system | People served | PFAS found (of 29) | PFOA | PFOS |
|---|---|---|---|---|
| Springfield Utility Board OR4100837 | 62,100 | 5 | 2.1 ppt below the MCL | — not detected above the reporting level |
| Hermiston, City of OR4100372 | 20,000 | 5 | — not detected above the reporting level | 8.6 ppt at or above the MCL |
| Bend, City of OR4100100 | 77,704 | 4 | 6.0 ppt at or above the MCL | — not detected above the reporting level |
| Klamath Falls Water Dept OR4100443 | 40,475 | 3 | — not detected above the reporting level | 7.1 ppt at or above the MCL |
| Rainbow Water District OR4100839 | 6,300 | 3 | 2.1 ppt below the MCL | 7.8 ppt at or above the MCL |
| Sherwood, City of OR4100816 | 19,885 | 2 | — not detected above the reporting level | — not detected above the reporting level |
| Milton-Freewater, City of OR4100522 | 7,145 | 2 | — not detected above the reporting level | 7.1 ppt at or above the MCL |
| Marcola Water District OR4100508 | 600 | 2 | — not detected above the reporting level | 6.3 ppt at or above the MCL |
| Sunrise Water Authority OR4100635 | 50,003 | 1 | — not detected above the reporting level | 4.3 ppt at or above the MCL |
| Keizer, City of OR4100744 | 38,585 | 1 | — not detected above the reporting level | — not detected above the reporting level |
Counties with the most systems that found PFAS
- Clackamas County 4 of 15 surveyed systems
- Lane County 3 of 9 surveyed systems
- Umatilla County 3 of 4 surveyed systems
- Washington County 1 of 10 surveyed systems
- Marion County 1 of 10 surveyed systems
- Deschutes County 1 of 5 surveyed systems
- Yamhill County 1 of 6 surveyed systems
- Polk County 1 of 4 surveyed systems