Oakland County tap water
1 of 39 water systems serving Oakland County with full PFAS testing averaged above a 2024 federal PFAS level at one or more sampling points.
- 107 community water systems list this county as served; 39 serve 3,300+ people with full PFAS testing.
- 16 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 |
|---|---|---|---|---|
| Troy | Purchased surface water | 85,854 | No | 0 |
| Rochester Hills | Purchased surface water | 74,000 | No | 0 |
| Waterford Township | Groundwater | 73,441 | No | 1 |
| Southfield | Purchased surface water | 71,739 | No | 0 |
| Pontiac | Purchased surface water | 63,776 | No | 0 |
| Royal Oak, City of | Purchased surface water | 57,236 | No | 0 |
| Farmington Hills, City of | Purchased surface water | 56,984 | No | 0 |
| Novi, City of | Purchased surface water | 56,780 | No | 0 |
| West Bloomfield Township | Purchased surface water | 49,479 | No | 0 |
| Bloomfield Township | Purchased surface water | 41,691 | No | 0 |
| Orion Township | Purchased surface water | 33,000 | No | 0 |
| Madison Heights | Purchased surface water | 29,694 | No | 0 |
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.