Wisconsin Water Quality
Check tap water quality for any ZIP code in Wisconsin. See contaminants, violations, and health risks for your water system.
Enter a Wisconsin ZIP code to get your free water quality report.
Water Quality in Wisconsin
Key factors and concerns
Wisconsin faces water quality challenges from agricultural runoff, including nitrate contamination in many private wells. PFAS contamination, naturally occurring radium, and aging infrastructure in older cities also affect drinking water quality.
What's in your Wisconsin water report
Contaminant levels
Every detected contaminant in your Wisconsin water system, compared to EPA limits and health guidelines.
Violation history
All EPA violations on record for water systems in Wisconsin, including health-based and monitoring violations.
Water quality grade
An A through F grade based on violation history, contaminant levels, and health guideline comparisons.
Filter recommendations
Which type of water filter will actually remove the contaminants found in your specific water system.
Check your Wisconsin water now
Enter your ZIP code for a free water quality report specific to your water system in Wisconsin.
Looking for another state? Browse all states