O Fallon
Is O Fallon tap water safe to drink?
Mostly yes — O Fallon scores 82/100. This report aggregates EPA drinking water data across 0 local systems in O Fallon. We found 0 total violations (0 unresolved).
Real-Time Environment
Live: 02:30 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in O Fallon.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in O Fallon?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Filter or no filter for O Fallon water? Here's what the data says.
Baby Formula Safety
What new parents in O Fallon should know about tap water safety.
Homebuyer's Perspective
Water quality is easy to overlook when evaluating a move to O Fallon, but it can affect plumbing longevity and appliance lifespan. The high safety score (82/100) suggests lower risk for plumbing corrosion and appliance scaling.
Health & Family Safety
Current records show no major contaminant spikes, making O Fallon a preferred choice for health-conscious families.
View Health Risk Glossary →Compliance Record for O Fallon
Based on EPA SDWIS violation records and contaminant test results for all water systems serving O Fallon.
Frequently Asked Questions
Is O Fallon tap water safe to drink?
Mostly yes — O Fallon scores 82/100.
How many water systems serve O Fallon?
O Fallon is served by 0 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in O Fallon?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for O Fallon.
What is the water quality score for O Fallon?
The water quality score for O Fallon is 82 out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in O Fallon?
Current contaminant data for O Fallon is being updated. Check back soon or search your specific address for the latest results.
O Fallon Water Quality Summary
O Fallon, MO receives a water quality score of 82/100 (Grade B) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 5 public water systems serving the area.
O Fallon'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.
O Fallon's score of 82 is 2 points above the Missouri state average of 80, and above the nationwide average of roughly 78/100 across all U.S. states.
Homeowners in the mid-size city of O Fallon, Missouri, receive their tap water from one of several distinct distribution systems, which draw from a region shaped by the agricultural plains near the Mississippi and Missouri river confluence. While the area's water quality generally aligns with solid safety standards, the surrounding agricultural landscape introduces runoff challenges typical of the Midwest. Consequently, prospective homebuyers might experience slight differences in tap water characteristics depending on which utility serves their property, though the city's supply remains highly dependable overall.
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 →
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Water Systems Serving O Fallon (0)
Water system data coming soon for O Fallon.
Check Your Specific Address
Water quality can vary by neighborhood in O Fallon.
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