Mequon, Wisconsin Water Quality Report
Water quality data for 25 water systems serving 16,344 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (16)
4H
Jul 2, 2025
75
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
75
Oct 17, 2024
2E
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
66
Jan 1, 2022
Resolved Violations (484)
4H
Jul 2, 2025
4H
Jul 2, 2025
66
Jan 1, 2025
66
Jan 1, 2025
4G
Oct 17, 2024
+ 479 more resolved violations
Frequently Asked Questions
Is Mequon tap water safe to drink?
Mequon'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 Mequon tap water?
0 contaminants have been detected in Mequon's water supply across 25 water systems. See the full contaminant table above for details.
How can I improve my water quality in Mequon?
Install a water filter rated for the specific contaminants found in Mequon's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Mequon have any water quality violations?
Yes, Mequon currently has 49 active violations. See the violations section above for details.