St Charles
Is St Charles tap water safe to drink?
Mostly yes — St Charles scores 84/100. This report aggregates EPA drinking water data across 2 local systems in St Charles. We found 21 total violations (13 unresolved).
Real-Time Environment
Live: 11:45 AM☀️ 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. The high safety score (84/100) 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 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?
Mostly yes — St Charles scores 84/100.
How many water systems serve St Charles?
St Charles is served by 2 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 84 out of 100, based on EPA contaminant data, violation history, and testing results across the 2 systems serving the city.
What are the top contaminants in St Charles?
The top contaminants detected in St Charles include Lead (90th percentile). View detailed information on our contaminants page.
St Charles Water Quality Summary
St Charles, MO receives a water quality score of 84/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 2 public water systems serving the area.
St Charles'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.
St Charles's score of 84 is 6 points above the Missouri state average of 78, and above the nationwide average of roughly 78/100 across all U.S. states.
For residents of St. Charles, tap water quality is closely tied to its Midwestern regional setting, where the Mississippi and Missouri rivers meet amidst agricultural plains. Serving this mid-size Missouri city are two separate water systems, meaning that prospective homebuyers should note which system serves a potential property. Overall, local households can expect reliable, above-average water quality, though the surrounding agricultural plains and river confluence require diligent treatment management. This combination of two utility systems and a unique river confluence setting defines the everyday water experience in the community.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Missouri water quality rankings report →
Key Contaminants
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Water Systems Serving St Charles (2)
Check Your Specific Address
Water quality can vary by neighborhood in St Charles.
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