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#29 of 49A

Wisconsin Water Quality

Wisconsin ranks #29 out of 49 states for tap water quality with a score of 84.7 out of 100.

Based on 418 scored cities covering 83.2% of the state's served population.

Summary

Overall Score
84.7
out of 100
Cities Tested
418
cities
Cities w/ Violations
407
97% of cities
Avg Contaminants
2.4
above guidelines
Population
3.9M
people affected

Best Cities in Wisconsin

Score: 100
Score: 100
Score: 100
Score: 100
Score: 100

Cities Needing Improvement

Score: 45
Score: 50
Score: 50
Score: 55
Score: 55

Cities listed carry the most serious water quality verdicts in Wisconsin, worst first, then the lowest scores. A city rated Safe is never listed.

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Frequently Asked Questions About Wisconsin Water Quality

Wisconsin ranks #29 out of 49 states and territories for water quality with a score of 84.7 out of 100 and a grade of A. A total of 418 cities were tested across the state.

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Your upload also helps us keep local water data accurate โ€” we only ever share anonymized, area-level summaries.

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