127 public water systems in Oregon were sampled in EPA's UCMR 5 programme (2023–2025); we show six PFAS and lithium. Read 2026-10-31.
11 of 127 systems had at least one sample above a 2024 federal limit; 28 had at least one PFAS found above the reporting level; 99 had none found above the reporting level.
A single sample above a 2024 limit is a measurement, not a violation. Compliance is judged on running yearly averages, and water systems have until 2029 to meet the limits. On 20 May 2026 EPA proposed giving qualifying systems until 2031 for PFOA and PFOS and removing the limits for PFHxS, PFNA and HFPO-DA; those proposals were not final when we last checked (5 Nov 2026). Counts are per system, not per person; population figures are available only for systems serving more than 25,000 people (about 2,649,375 people across those systems here). UCMR 5 was a one-time national monitoring programme (2023–2025). The results are a snapshot at the system's entry points or taps on the sample dates, not a continuous measurement and not a compliance record.
| System | People served | UCMR 5 result |
|---|---|---|
| Portland Portland Water Bureau | 666,200 | None detected (below the reporting level) |
Pages for these are being added in stages. The data for all 127 systems is in the public dataset.
| System | People served | UCMR 5 result |
|---|---|---|
| Tualatin Valley Water District Tualatin Valley Water District | 224,600 | None detected (below the reporting level) |
| Salem Public Works Salem Public Works | 199,820 | None detected (below the reporting level) |
| Eugene Water & Electric Board Eugene Water & Electric Board | 176,000 | None detected (below the reporting level) |
| Medford Water Commission Medford Water Commission | 106,068 | None detected (below the reporting level) |
| Hillsboro, City of Hillsboro, City of | 92,632 | None detected (below the reporting level) |
| Beaverton, City of Beaverton, City of | 88,045 | None detected (below the reporting level) |
| Bend Water Department Bend Water Department | 77,704 | Above the 2024 limit in at least one sample |
| Gresham, City of Gresham, City of | 73,932 | None detected (below the reporting level) |
| Rockwood Pud Rockwood Pud | 65,443 | None detected (below the reporting level) |
| Tigard, City of Tigard, City of | 62,500 | None detected (below the reporting level) |
| Springfield Utility Board Springfield Utility Board | 62,100 | Above the 2024 limit in at least one sample |
| Corvallis, City of Corvallis, City of | 61,468 | None detected (below the reporting level) |
| Albany, City of Albany, City of | 57,997 | None detected (below the reporting level) |
| Sunrise Water Authority Sunrise Water Authority | 50,003 | Above the 2024 limit in at least one sample |
| Klamath Falls Water Dept Klamath Falls Water Dept | 40,475 | Above the 2024 limit in at least one sample |
| Lake Oswego Municipal Water Lake Oswego Municipal Water | 40,000 | None detected (below the reporting level) |
| Keizer, City of Keizer, City of | 38,585 | Detected, below the 2024 limit |
| Redmond Water Department Redmond Water Department | 38,208 | None detected (below the reporting level) |
| Grants Pass, City of Grants Pass, City of | 37,138 | None detected (below the reporting level) |
| Avion Wc - Greater Avion Avion Wc - Greater Avion | 35,332 | None detected (below the reporting level) |
| Mcminnville Water & Light Mcminnville Water & Light | 34,515 | None detected (below the reporting level) |
| Coos Bay North Bend Wtr Brd Coos Bay North Bend Wtr Brd | 34,500 | None detected (below the reporting level) |
| Oregon City, Or Oregon City, Or | 33,940 | None detected (below the reporting level) |
| Oak Lodge Water Services Oak Lodge Water Services | 30,000 | None detected (below the reporting level) |
| Clackamas River Water - Clackamas Clackamas River Water - Clackamas | 29,918 | None detected (below the reporting level) |