St. Louis County, MO

ZIP 63131

In ZIP 63131, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Kirkwood Pws meets every EPA legal limit; 11 contaminants are above health goals, led by lead at 813× California’s Public Health Goal.
• Nearest Superfund site: Valley Park TCE, 4.1 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Control Devices (36%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.8 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 63131

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

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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