Northbrook, Illinois Water Quality Report
Water quality data for 14 water systems serving 45,899 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (11)
4H
Jul 2, 2025
4H
Jul 2, 2025
4H
Jul 2, 2025
4H
Jul 2, 2025
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
52
Oct 1, 2024
52
Oct 1, 2024
Resolved Violations (489)
75
Jan 16, 2025
75
Jan 16, 2025
27
Jan 1, 2025 — Mar 31, 2025
66
Jan 1, 2025
27
Jan 1, 2025 — Mar 31, 2025
+ 484 more resolved violations
Frequently Asked Questions
Is Northbrook tap water safe to drink?
Northbrook'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 Northbrook tap water?
0 contaminants have been detected in Northbrook's water supply across 14 water systems. See the full contaminant table above for details.
How can I improve my water quality in Northbrook?
Install a water filter rated for the specific contaminants found in Northbrook's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Northbrook have any water quality violations?
Yes, Northbrook currently has 94 active violations. See the violations section above for details.