St. Charles County, MO

ZIP 63348

In ZIP 63348, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mo American Warren County Water & Sewer meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 78× 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 (79%), 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 73,812 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 63348

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

Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources

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