Wisconsin
Water Quality Report
85 Good
Average Score
85/100
Water Systems
403
Population
4.1M
Violations
0 all resolved
Score Distribution
1 A
1 B
1 C
0 D
0 F
Top Contaminant Violations
| Contaminant | Violations |
|---|---|
| Haloacetic Acids (HAA5) | 2 |
| Barium | 1 |
| Fluoride | 1 |
Lowest Scoring Water Systems
Counties in Wisconsin
Cities in Wisconsin
View all 340 cities →Popular City Comparisons in Wisconsin
Quickly compare major cities in Wisconsin by water quality score and grade.
Frequently Asked Questions
Is tap water in Wisconsin safe to drink?
Wisconsin has an average WaterQ score of 85/100 across 403 public water systems. Safety can vary by city and system, so check your local report for recent violations and contaminants.
How many water systems are in Wisconsin?
WaterQ currently tracks 403 public water systems in Wisconsin.
Where can I compare cities in Wisconsin?
Use the city list below to open detailed reports, or visit the compare tool to benchmark two cities side-by-side on score, grade, and system coverage.