Waterloo, Illinois Water Quality Report
Water quality data for 1 water system serving 10,190 people.
Water Source
Detected Contaminants
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Compliance & Violations
Active Violations (7)
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (109)
03
Apr 1, 2025 — Jun 30, 2025
03
Apr 1, 2025 — Jun 30, 2025
03
Apr 1, 2025 — Jun 30, 2025
03
Apr 1, 2025 — Jun 30, 2025
03
Apr 1, 2025 — Jun 30, 2025
+ 104 more resolved violations
Frequently Asked Questions
Is Waterloo tap water safe to drink?
Waterloo's water meets all EPA maximum contaminant levels. However, 3 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Waterloo tap water?
3 contaminants have been detected in Waterloo's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in Waterloo?
Install a water filter rated for the specific contaminants found in Waterloo's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Waterloo have any water quality violations?
Yes, Waterloo currently has 7 active violations. See the violations section above for details.