PFAS in Tribal Systems, EPA Region 5 drinking water
EPA's final UCMR 5 data covers 13 public water systems in Tribal Systems, EPA Region 5, serving about 84,014 people. PFAS turned up in 1 of them (8%). 0 averaged above at least one EPA limit at a sampling point.
Every tested system in Tribal Systems, EPA Region 5
Largest first. PFOA and PFOS columns show the average at each system's worst sampling point; EPA's limit for each is 4 ppt. Filter by name:
| Water system | People | PFOA | PFOS | PFAS found | Result |
|---|---|---|---|---|---|
| Sioux Trail · Prior Lake | 24,959 | - | - | 0 | None found |
| Mt. Pleasant | 10,198 | - | - | 0 | None found |
| East Bay Water Works · Sutton Bay | 7,284 | - | - | 0 | None found |
| Prairie Island · Welch | 6,699 | - | - | 0 | None found |
| Saganing · Standish | 5,350 | - | - | 0 | None found |
| Oneida #1 Or Site #1 · Oneida | 4,393 | - | - | 0 | None found |
| Hannahville Community · Wilson | 4,382 | - | - | 0 | None found |
| Vineland · Onamia | 4,220 | - | - | 0 | None found |
| Lower Sioux · Morton | 4,000 | - | - | 0 | None found |
| Keshena · Keshena | 3,960 | - | - | 0 | None found |
| Lac Du Flambeau · Lac Du Flambeau | 2,962 | - | - | 1 | Below limits |
| South-central Water System · Bowler | 2,805 | - | - | 0 | None found |
| Little River Tribal Water System · Manistee | 2,802 | - | - | 0 | None found |
Cite this page
Well & Tap. "PFAS in Tribal Systems, EPA Region 5 drinking water: results for 13 systems." Data: U.S. EPA UCMR 5, final release August 2026. https://wellandtap.com/pfas/tribal-systems-epa-region-5/
Source: EPA UCMR 5 final occurrence data (August 2026); population from EPA SDWIS. Method.