St Louis
Is St Louis tap water safe to drink?
Use extra caution — St Louis scores 61/100. This report aggregates EPA drinking water data across 1 local system in St Louis. We found 4 total violations (1 unresolved).
Real-Time Environment
Live: 02:30 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in St Louis.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in St Louis?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Should you buy a water purifier in St Louis? See our analysis.
Baby Formula Safety
Is St Louis tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to St Louis, water quality is a key factor in long-term property maintenance. With a score of 61/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.
Health & Family Safety
Residents should monitor Chlorine 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 Louis
Based on EPA SDWIS violation records and contaminant test results for all water systems serving St Louis.
Frequently Asked Questions
Is St Louis tap water safe to drink?
Use extra caution — St Louis scores 61/100.
How many water systems serve St Louis?
St Louis is served by 1 public water system in our latest EPA-backed dataset.
How can I check water quality for my exact address in St Louis?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for St Louis.
What is the water quality score for St Louis?
The water quality score for St Louis is 61 out of 100, based on EPA contaminant data, violation history, and testing results for all serving water systems.
What are the top contaminants in St Louis?
The top contaminants detected in St Louis include Chlorine, Fluoride, Copper. View detailed information on our contaminants page.
St Louis Water Quality Summary
St Louis, MO receives a water quality score of 61/100 (Grade C) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 3 public water systems serving the area.
St Louis'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.
St Louis's score of 61 is 19 points below the Missouri state average of 80, and below the nationwide average of roughly 78/100 across all U.S. states.
For prospective homebuyers looking at St. Louis, Missouri, this large city distributes its water through three distinct systems located in the Midwest confluence of the Mississippi and Missouri rivers. The municipal supply exhibits average performance, suggesting that the surrounding agricultural plains present ongoing quality challenges for the area's water infrastructure. While the tap water serves the community daily, its moderate quality standing suggests that residents may want to look closer at the specific system servicing their potential home.
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 Louis (1)
Check Your Specific Address
Water quality can vary by neighborhood in St Louis.
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