St. Charles
Is St. Charles tap water safe to drink?
Use extra caution — St. Charles scores 55/100. This report aggregates EPA drinking water data across 3 local systems in St. Charles. We found 115 total violations (72 unresolved).
Real-Time Environment
Live: 07:45 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in St. Charles.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in St. Charles?
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 St. Charles.
Baby Formula Safety
EPA compliance thresholds and pediatric water precautions for St. Charles.
Homebuyer's Perspective
Water system history in St. Charles informs property maintenance and private filtration requirements. With a score of 55/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.
Health & Family Safety
Residents should monitor Copper (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 St. Charles
Based on EPA SDWIS violation records and contaminant test results for all water systems serving St. Charles.
Frequently Asked Questions
Is St. Charles tap water safe to drink?
Use extra caution — St. Charles scores 55/100.
How many water systems serve St. Charles?
St. Charles is served by 3 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in St. Charles?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for St. Charles.
What is the water quality score for St. Charles?
The water quality score for St. Charles is 55 out of 100, based on EPA contaminant data, violation history, and testing results across the 3 systems serving the city.
What are the top contaminants in St. Charles?
The top contaminants detected in St. Charles include Copper (90th percentile), Lead (90th percentile). View detailed information on our contaminants page.
St. Charles Water Quality Summary
St. Charles, IL receives a water quality score of 55/100 (Grade D) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 3 public water systems serving the area.
St. Charles's water quality score is below the national average, indicating a history of EPA violations or elevated contaminant levels. Residents are encouraged to check their specific water system report and consider additional filtration.
St. Charles's score of 55 is 11 points below the Illinois state average of 66, 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 Illinois water quality rankings report →
Key Contaminants
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Water Systems Serving St. Charles (3)
Check Your Specific Address
Water quality can vary by neighborhood in St. Charles.
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