Clackamas County tap water
2 of 15 water systems serving Clackamas County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 84 community water systems list this county as served; 15 serve 3,300+ people with full PFAS testing.
- 24 had a health-based violation since 2021-10-26.
Largest systems serving this county
| System | Source | People served (whole system) | PFAS above a 2024 level? | Violations since 2021-10-26 |
|---|---|---|---|---|
| Sunrise Water Authority | Purchased surface water | 50,003 | Yes | 0 |
| Lake Oswego Municipal Water | Purchased surface water | 40,000 | No | 0 |
| Oregon City | Purchased surface water | 33,940 | No | 0 |
| Oak Lodge Water Services | Purchased surface water | 30,000 | No | 1 |
| Clackamas River Water | Surface water | 29,918 | No | 0 |
| West Linn, City of | Purchased surface water | 28,000 | No | 0 |
| Wilsonville, City of | Surface water | 25,915 | No | 0 |
| Milwaukie, City of | Groundwater | 20,946 | Yes | 0 |
| Clackamas River Water - Clairmont | Purchased surface water | 19,928 | No | 0 |
| Canby Utility | Surface water | 18,754 | No | 0 |
| Sandy, City of | Surface water | 12,991 | No | 1 |
| Gladstone, City of | Purchased surface water | 12,121 | No | 8 |
Which one is yours? A county usually has several utilities. Your bill or your utility's annual water-quality report names yours. Population is for the whole system, which can cross county lines.
Not medical or legal advice. UCMR 5 results are screening data, not compliance determinations.
Sources and freshness
Public-water-system facts, violations and lead/copper results: EPA ECHO SDWA download (SDWIS snapshot 2026-10-13). PFAS and lithium results: EPA UCMR 5 final data (sampling 2023–2025). Both are U.S. government works, downloaded 2026-10-26. Numbers are computed by the published method; the same fields are in the open data files.