Mattoon, Illinois Water Quality Report
Water quality data for 3 water systems serving 29,120 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| PFBA | 0.007 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
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Compliance & Violations
Active Violations (24)
72
Jul 1, 2025
72
Jul 1, 2025
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Resolved Violations (93)
03
Apr 1, 2023 — Jun 30, 2023
03
Apr 1, 2023 — Jun 30, 2023
03
Apr 1, 2023 — Jun 30, 2023
03
Apr 1, 2023 — Jun 30, 2023
23
Jun 1, 2010 — Jun 30, 2010
+ 88 more resolved violations
Frequently Asked Questions
Is Mattoon tap water safe to drink?
Mattoon's water meets all EPA maximum contaminant levels. However, 1 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Mattoon tap water?
1 contaminants have been detected in Mattoon's water supply across 3 water systems. See the full contaminant table above for details.
How can I improve my water quality in Mattoon?
Install a water filter rated for the specific contaminants found in Mattoon's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Mattoon have any water quality violations?
Yes, Mattoon currently has 24 active violations. See the violations section above for details.