St. Louis city, MO

ZIP 63109

In ZIP 63109, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mo American St Louis St Charles Counties meets every EPA legal limit; 10 contaminants are above health goals, led by lithium at 3.8× the USGS health-based screening level.
• Nearest Superfund site: Sauget Area 2, 4.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Control Devices (31%), mostly chromium.
• Fine particles (PM2.5) average 9.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 63109

• Superfund sites nearbyD to F
• Factories and industrial sitesD to F
• Oil and gas wellsA to D
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityC
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsC

Based on 10 census tracts · compiled October 25, 2026 · how each grade works and its sources

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