St. Charles County, MO

ZIP 63367

In ZIP 63367, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: St Charles County Pwsd 2 has 1 contaminant at or over an EPA legal limit; 17 contaminants are above health goals, led by nitrite at 15× https://pmc.ncbi.nlm.nih.gov/articles/PMC4535738/.
• Nearest Superfund site: Weldon Spring Former Army Ordnance Works, 3.5 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Ameren Missouri Labadie Energy Center (43%), mostly chromium compounds.
• Fine particles (PM2.5) average 8.6 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 63367

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

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

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