PFAS above EPA’s limits in Michigan.

5 utilities of the 311 EPA tested in Michigan had a sampling location whose PFAS average was above a 2024 limit in its final UCMR 5 data, by EPA’s own method.

The short answer

5 utilities serving 219,330 people, as they report it, had a location averaging above a limit, most often PFOS (3) and PFOA (3). The largest is Kalamazoo, whose highest PFOS average was 6.5 ppt, 1.6 times the limit. The furthest above is Independence Township, at 2.8 times the Hazard Index 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.

Michigan utilities above a 2024 PFAS limit
Utility	Based in	Serves	Above	Highest location average	Highest single sample
Kalamazoo	Kalamazoo	192,992	PFOS	PFOS 6.5 ppt1.6 times the limit	6.7 ppt
Independence Township	Clarkston	11,790	PFOA, PFOS, PFHxS, Hazard Index	Hazard Index 2.802.8 times the limit	—
Dundee	Dundee	5,400	PFOA	PFOA 8.2 ppt2.1 times the limit	13 ppt
Gladstone	Gladstone	4,632	PFOS	PFOS 7.5 ppt1.9 times the limit	11 ppt
Fremont	Fremont	4,516	PFOA	PFOA 4.6 ppt1.1 times the limit	4.7 ppt

2 more utilities in Michigan had a single sample above a limit but no location average above, so they are 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.

Utilities above a limit

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