Water Quality in St. Louis, MO
Detailed water quality data for St. Louis, Missouri including contaminant levels, EPA comparisons, AquaScore™ grading, and treatment recommendations.
Water utility: Missouri American Water.
Water source: Missouri River, Mississippi River.
Key Contaminants Found
- Total trihalomethanes (TTHMs)
- Haloacetic acids (HAA5)
- Atrazine
- Lead
- Chromium (hexavalent)
St. Louis draws from two of America's most heavily used rivers. Agricultural herbicide runoff from the Midwest grain belt creates seasonal spikes in atrazine levels.