Safe
Missouri, United States
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Last reviewed:
Is Tap Water Safe to Drink in St Louis?
Yes, tap water in St. Louis is safe to drink. It's drawn from the Missouri and Mississippi Rivers and treated at one of the largest water plants in the world.
Hardness
Moderate
pH
7.5–8.0
TDS
ranges 150–250 ppm
EPA Status
Compliant
Soft
Moderate
Hard
Very Hard
Water Source
The St. Louis Water Division operates the Chain of Rocks plant, historically one of the largest water treatment facilities anywhere, drawing from both the Missouri and Mississippi Rivers.
EPA Compliance Status
Meets all federal Safe Drinking Water Act standards.
Notable Contaminants & Context
- •No significant compliance concerns
How It Compares
St. Louis's system has a long engineering history, having pioneered several large-scale treatment techniques in the early 20th century that influenced water treatment standards nationally.
Tips
- •The St. Louis Water Division publishes an annual water quality report
- •No need for bottled water around the city
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality