Johnston City, Illinois Water Quality Report
Water quality data for 1 water system serving 3,509 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| PFBA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
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Compliance & Violations
Active Violations (5)
52
Jul 1, 2025
52
Jul 1, 2025
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
Resolved Violations (15)
75
Aug 22, 2025
75
Aug 22, 2025
72
Jul 1, 2024
72
Jul 1, 2024
72
Jul 1, 2018
+ 10 more resolved violations
Frequently Asked Questions
Is Johnston City tap water safe to drink?
Johnston City'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 Johnston City tap water?
1 contaminants have been detected in Johnston City's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in Johnston City?
Install a water filter rated for the specific contaminants found in Johnston City's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Johnston City have any water quality violations?
Yes, Johnston City currently has 5 active violations. See the violations section above for details.