Ann Arbor, Michigan Water Quality Report
Water quality data for 12 water systems serving 279,196 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| PFBA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHpA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
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Compliance & Violations
Active Violations (22)
72
Jul 1, 2025
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Resolved Violations (272)
34
Jun 8, 2025
34
Jun 8, 2025
34
Jun 8, 2025
4B
Nov 11, 2024
4B
Nov 11, 2024
+ 267 more resolved violations
Frequently Asked Questions
Is Ann Arbor tap water safe to drink?
Ann Arbor's water meets all EPA maximum contaminant levels. However, 4 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Ann Arbor tap water?
4 contaminants have been detected in Ann Arbor's water supply across 12 water systems. See the full contaminant table above for details.
How can I improve my water quality in Ann Arbor?
Install a water filter rated for the specific contaminants found in Ann Arbor's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Ann Arbor have any water quality violations?
Yes, Ann Arbor currently has 22 active violations. See the violations section above for details.