St. Charles County, MO

ZIP 63365

In ZIP 63365, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: St Charles County Pwsd 2 meets every EPA legal limit; 12 contaminants are above health goals, led by pfos at 1.9× California’s Public Health Goal.
• Nearest Superfund site: Weldon Spring Former Army Ordnance Works, 6.9 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Ameren Missouri Labadie Energy Center (63%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 138,436 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 63365

• Superfund sites nearbyD to F
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityB to C
• Drinking water qualityA to C
• Pesticide useD
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsC

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

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