St. Louis County, MO

ZIP 63125

In ZIP 63125, 8 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 1, 4.5 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Agraform (52%), mostly chlorothalonil.
• 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 63125

• Superfund sites nearbyD to F
• Factories and industrial sitesB to D
• Oil and gas wellsC to F
• Parks and nature nearbyB to D
• Air qualityF
• Drinking water qualityC
• Pesticide useA to C
• Neighborhood health statusB to F
• Past wildfire impactsA
• Past flood impactsA to C
• Noise levelsA to D
• Radiation signalsC to D

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

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