Oak Lawn, Illinois Water Quality Report
Water quality data for 1 water system serving 58,362 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (14)
72
Jul 1, 2025
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (25)
72
Jul 1, 2023
72
Jul 1, 2023
66
Dec 30, 2022
66
Dec 30, 2022
72
Jul 1, 2016
+ 20 more resolved violations
Frequently Asked Questions
Is Oak Lawn tap water safe to drink?
Oak Lawn's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Oak Lawn tap water?
0 contaminants have been detected in Oak Lawn's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in Oak Lawn?
Install a water filter rated for the specific contaminants found in Oak Lawn's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Oak Lawn have any water quality violations?
Yes, Oak Lawn currently has 14 active violations. See the violations section above for details.