PFAS · Michigan
PFAS in Michigan drinking water: EPA’s final survey results
EPA’s national PFAS survey (UCMR 5) tested 310 of the community water systems that serve homes in Michigan. 43 found at least one of 29 PFAS above the laboratory reporting level, and 5 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 January 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
PFBA was the compound Michigan community systems found most often: 14 of 310 tested systems measured it above the reporting level. Across the country, 35% of surveyed community systems found at least one PFAS; in Michigan the share is 14%. The largest Michigan system with a detection, Kalamazoo, serves 192,992 people and found 5 of the 29 compounds.
Which PFAS were found most often in Michigan
Each row counts the Michigan 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 |
|---|---|---|---|
| PFBA | 14 | 310 | 5% |
| PFBS | 14 | 310 | 5% |
| PFPeA | 13 | 310 | 4% |
| PFHxS | 7 | 310 | 2% |
| PFOA | 7 | 310 | 2% |
| PFHxA | 6 | 310 | 2% |
| 6:2 FTS | 3 | 310 | 1% |
| PFOS | 3 | 310 | 1% |
| HFPO-DA (GenX) | 1 | 310 | 0% |
| PFHpA | 1 | 310 | 0% |
| PFNA | 1 | 310 | 0% |
| PFPeS | 1 | 310 | 0% |
Michigan 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 |
|---|---|---|---|---|
| Independence Township MI0003342 | 11,790 | 8 | 6.0 ppt at or above the MCL | 9.7 ppt at or above the MCL |
| Kalamazoo MI0003520 | 192,992 | 5 | 2.0 ppt below the MCL | 6.6 ppt at or above the MCL |
| Otsego MI0005060 | 4,120 | 5 | 2.0 ppt below the MCL | — not detected above the reporting level |
| Ann Arbor MI0000220 | 123,851 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Scio Township MI0005977 | 8,500 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Kingsford MI0003640 | 5,480 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Kinross Township MI0003630 | 5,300 | 3 | — not detected above the reporting level | — not detected above the reporting level |
| Portage MI0005520 | 46,292 | 2 | — not detected above the reporting level | — not detected above the reporting level |
| Plainfield Township MI0005370 | 42,271 | 2 | — not detected above the reporting level | — not detected above the reporting level |
| Charlotte, City of MI0001340 | 9,074 | 2 | — not detected above the reporting level | — not detected above the reporting level |
Counties with the most systems that found PFAS
- Oakland County 8 of 39 surveyed systems
- Macomb County 3 of 19 surveyed systems
- Washtenaw County 3 of 10 surveyed systems
- Kent County 2 of 14 surveyed systems
- Kalamazoo County 2 of 3 surveyed systems
- Ottawa County 2 of 11 surveyed systems
- Saginaw County 2 of 9 surveyed systems
- Monroe County 2 of 6 surveyed systems