St. Charles County, MO

ZIP 63376

In ZIP 63376, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: St Paul Pws meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 44× California’s Public Health Goal.
• Nearest Superfund site: Westlake Landfill, 6.2 miles away.
• Largest share of modeled toxic air from industry: Wood River Refinery (28%), 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 138,436 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 63376

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

Based on 23 census tracts · compiled September 10, 2026 · how each grade works and its sources

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