Mason City
Is Mason City tap water safe to drink?
Generally acceptable, but review local hotspots — score 76/100. This report aggregates EPA drinking water data across 1 local system in Mason City. We found 647 total violations (18 unresolved).
Real-Time Environment
Live: 07:30 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Mason City.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Mason City?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Evaluation of municipal compliance and household filtration options in Mason City.
Baby Formula Safety
EPA compliance thresholds and pediatric water precautions for Mason City.
Homebuyer's Perspective
Water system history in Mason City informs property maintenance and private filtration requirements. With a score of 76/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.
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 Mason City
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Mason City.
Frequently Asked Questions
Is Mason City tap water safe to drink?
Generally acceptable, but review local hotspots — score 76/100.
How many water systems serve Mason City?
Mason City is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in Mason City?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Mason City.
What is the water quality score for Mason City?
The water quality score for Mason City is 76 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 Mason City?
The top contaminants detected in Mason City include Lead (90th percentile). View detailed information on our contaminants page.
Mason City Water Quality Summary
Mason City, IA receives a water quality score of 76/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 1 public water system serving the area.
Mason City's water quality is near the national average. While most systems meet EPA standards, some violations have been recorded. Residents may wish to review their specific water system's report for contaminant details.
Mason City's score of 76 is 4 points above the Iowa state average of 72, and below the nationwide average of roughly 78/100 across all U.S. states.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Iowa water quality rankings report →
Key Contaminants
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Water Systems Serving Mason City (1)
Check Your Specific Address
Water quality can vary by neighborhood in Mason City.
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