Superior, Wisconsin Water Quality Report
Water quality data for 2 water systems serving 26,179 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (17)
45
Dec 13, 2025
71
Jul 1, 2025
72
Jul 1, 2025
75
Mar 26, 2025
57
Mar 26, 2025
75
Feb 10, 2025
34
Jan 16, 2025
34
Jan 16, 2025
75
Oct 17, 2024
2E
Oct 17, 2024
75
Oct 17, 2024
75
Oct 17, 2024
75
Oct 1, 2024
75
Jul 1, 2024
12
Jun 2, 2024
66
Oct 1, 2023
66
Jan 1, 2023
Resolved Violations (483)
4A
Feb 10, 2025
2A
Feb 10, 2025
2A
Feb 10, 2025
4A
Feb 10, 2025
2A
Feb 10, 2025
+ 478 more resolved violations
Frequently Asked Questions
Is Superior tap water safe to drink?
Superior'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 Superior tap water?
0 contaminants have been detected in Superior's water supply across 2 water systems. See the full contaminant table above for details.
How can I improve my water quality in Superior?
Install a water filter rated for the specific contaminants found in Superior's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Superior have any water quality violations?
Yes, Superior currently has 35 active violations. See the violations section above for details.