Waukesha, Wisconsin Water Quality Report
Water quality data for 7 water systems serving 72,340 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (10)
4H
Jul 2, 2025
4H
Jul 2, 2025
72
Jul 1, 2025
72
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
75
Oct 17, 2024
75
Oct 17, 2024
75
Sep 29, 2023
75
Sep 29, 2023
Resolved Violations (490)
71
Jul 1, 2025
71
Jul 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
2E
Oct 17, 2024
+ 485 more resolved violations
Frequently Asked Questions
Is Waukesha tap water safe to drink?
Waukesha'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 Waukesha tap water?
0 contaminants have been detected in Waukesha's water supply across 7 water systems. See the full contaminant table above for details.
How can I improve my water quality in Waukesha?
Install a water filter rated for the specific contaminants found in Waukesha's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Waukesha have any water quality violations?
Yes, Waukesha currently has 501 active violations. See the violations section above for details.