PFAS above EPA’s limits in Oregon.
The short answer
9 utilities serving 226,133 people, as they report it, had a location averaging above a limit, most often PFOS (8) and PFOA (1). The largest is City of Bend, whose highest PFOA average was 6.0 ppt, 1.5 times the limit. The furthest above is City of Hermiston, at 2.1 times the PFOS limit.
These are EPA’s survey results, not violations: the limits take effect April 26, 2029, and compliance will rest on each utility’s own monitoring. EPA has proposed changes to the rule; as of Oct. 13, 2026, none is final.
Utilities above a limit
Largest first. Each one’s highest location average is for the limit it is furthest above, with the single highest sample of the same PFAS; its report has every result.
| Utility | Based in | Serves | Above | Highest location average | Highest single sample |
|---|---|---|---|---|---|
| City of Bend | Bend | 77,704 | PFOA | PFOA 6.0 ppt1.5 times the limit | 7.9 ppt |
| Sunrise Water Authority | Happy Valley | 50,003 | PFOS | PFOS 4.3 ppt1.07 times the limit | 4.3 ppt |
| Klamath Falls Water Dept | Klamath Falls | 40,475 | PFOS | PFOS 7.1 ppt1.8 times the limit | 9.5 ppt |
| City of Milwaukie | Milwaukie | 20,946 | PFOS | PFOS 6.7 ppt1.7 times the limit | 7.0 ppt |
| City of Hermiston | Hermiston | 20,000 | PFOS | PFOS 8.6 ppt2.1 times the limit | 12 ppt |
| City of Milton - Freewater | Milton - Freewater | 7,145 | PFOS | PFOS 7.1 ppt1.8 times the limit | 7.2 ppt |
| Rainbow Water District | Springfield | 6,300 | PFOS | PFOS 7.8 ppt1.9 times the limit | 9.4 ppt |
| City of Dundee | Dundee | 2,960 | PFOS | PFOS 4.8 ppt1.2 times the limit | 5.4 ppt |
| Marcola Water District | Springfield | 600 | PFOS | PFOS 6.3 ppt1.6 times the limit | 6.8 ppt |
1 more utility in Oregon had a single sample above a limit but no location average above, so it is not listed; each report shows the sample.
Results: EPA UCMR 5 occurrence data, file of Oct. 15, 2026, samples from Jan. 3, 2023 to June 17, 2026, averaged by sampling location as EPA’s final UCMR 5 data summary does. Every state, and the full data as a CSV; how this list is made. People served is what each utility reports.
Where to go next
- City of Bend’s reportEvery PFAS result with its dates, and the certification claim that handles each.Open the report
- Every stateThe national list, the largest utilities above a limit, and the data to download.PFAS above EPA’s limits
- Filters certified for PFASRanked by certification and what they cost over five years.Best water filters for PFAS