Oak Brook, Illinois Water Quality Report
Water quality data for 7 water systems serving 13,471 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (15)
72
Jul 1, 2025
Violation
Unknown
Violation
Unknown
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Unknown
Violation
Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
Resolved Violations (485)
03
Jul 1, 2025 — Sep 30, 2025
03
Jul 1, 2025 — Sep 30, 2025
19
Mar 1, 2025 — Mar 31, 2025
3A
Mar 1, 2025 — Mar 31, 2025
19
Feb 1, 2025 — Feb 28, 2025
+ 480 more resolved violations
Frequently Asked Questions
Is Oak Brook tap water safe to drink?
Oak Brook'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 Brook tap water?
0 contaminants have been detected in Oak Brook's water supply across 7 water systems. See the full contaminant table above for details.
How can I improve my water quality in Oak Brook?
Install a water filter rated for the specific contaminants found in Oak Brook'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 Brook have any water quality violations?
Yes, Oak Brook currently has 68 active violations. See the violations section above for details.