Zion, Illinois Water Quality Report
Water quality data for 3 water systems serving 24,503 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 43.3 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 433% | Above guideline |
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Compliance & Violations
Active Violations (24)
72
Jul 1, 2025
66
Jan 1, 2025
75
Oct 17, 2024
2E
Oct 17, 2024
52
Oct 1, 2023
52
Oct 1, 2023
52
Oct 1, 2023
Violation
Unknown
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Resolved Violations (410)
3A
Jul 1, 2025 — Jul 31, 2025
3A
Jul 1, 2025 — Jul 31, 2025
3A
Jul 1, 2025 — Jul 31, 2025
3A
Dec 1, 2024 — Dec 31, 2024
3A
Dec 1, 2024 — Dec 31, 2024
+ 405 more resolved violations
Frequently Asked Questions
Is Zion tap water safe to drink?
Zion'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 Zion tap water?
1 contaminants have been detected in Zion's water supply across 3 water systems. See the full contaminant table above for details.
How can I improve my water quality in Zion?
Install a water filter rated for the specific contaminants found in Zion's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Zion have any water quality violations?
Yes, Zion currently has 24 active violations. See the violations section above for details.