West Allis
Is West Allis tap water safe to drink?
Mostly yes — West Allis scores 98/100. This report aggregates EPA drinking water data across 1 local system in West Allis. We found 10 total violations (1 unresolved).
Real-Time Environment
Live: 04:15 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in West Allis.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in West Allis?
Expert Advice
Your water quality is excellent. Standard filtration is optional but can further enhance taste.
Buying a Filter?
Filter or no filter for West Allis water? Here's what the data says.
Baby Formula Safety
What new parents in West Allis should know about tap water safety.
Homebuyer's Perspective
Water quality is easy to overlook when evaluating a move to West Allis, but it can affect plumbing longevity and appliance lifespan. The high safety score (98/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for West Allis
Based on EPA SDWIS violation records and contaminant test results for all water systems serving West Allis.
Frequently Asked Questions
Is West Allis tap water safe to drink?
Mostly yes — West Allis scores 98/100.
How many water systems serve West Allis?
West Allis is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in West Allis?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for West Allis.
What is the water quality score for West Allis?
The water quality score for West Allis is 98 out of 100, based on EPA contaminant data, violation history, and testing results across the 1 system serving the city.
What are the top contaminants in West Allis?
The top contaminants detected in West Allis include Lead (90th percentile). View detailed information on our contaminants page.
West Allis Water Quality Summary
West Allis, WI receives a water quality score of 98/100 (Grade A) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
West Allis's water quality is above the national average, with strong compliance records and low contaminant levels. Residents generally receive clean, safe tap water that meets EPA standards.
West Allis's score of 98 is 13 points above the Wisconsin state average of 85, and above the nationwide average of roughly 78/100 across all U.S. states.
For residents and prospective homebuyers in West Allis, a single municipal water system manages the entire city's supply, maintaining an outstanding level of quality and safety. This mid-size Wisconsin city is situated in the Upper Midwest, a region rich in freshwater lakes, agricultural land, and dairy country. The local system consistently achieves excellent performance marks, ensuring that households throughout the community can depend on their tap water for everyday use.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Wisconsin water quality rankings report →
Key Contaminants
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Water Systems Serving West Allis (1)
Check Your Specific Address
Water quality can vary by neighborhood in West Allis.
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