St. Louis County, MO

ZIP 63123

In ZIP 63123, 9 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; 18 contaminants are above health goals, led by lead at 13× California’s Public Health Goal.
• Nearest Superfund site: Sauget Area 2, 6.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Control Devices (44%), mostly chromium.
• Fine particles (PM2.5) average 9.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 18,909 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 63123

• Superfund sites nearbyD
• Factories and industrial sitesC to D
• Oil and gas wellsB to F
• Parks and nature nearbyD to F
• Air qualityF
• Drinking water qualityD
• Pesticide useB to C
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC to F
• Noise levelsA to C
• Radiation signalsC to D

Based on 18 census tracts · compiled September 10, 2026 · how each grade works and its sources

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