St. Louis County, MO

ZIP 63140

In ZIP 63140, 5 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: St. Louis Airport/hazelwood Interim Storage/futura Coatings Co., 1.7 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: The Boeing Co (33%), mostly trichloroethylene.
• Fine particles (PM2.5) average 9.2 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 63140

• Superfund sites nearbyD to F
• Factories and industrial sitesD to F
• Oil and gas wellsC
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityC
• Pesticide useB
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsC to F
• Radiation signalsC

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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