Jefferson County, MO

ZIP 63028

In ZIP 63028, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mackenzie Ridge Llc meets every EPA legal limit; 3 contaminants are above health goals, led by lead at 33× California’s Public Health Goal.
• Nearest Superfund site: Big River Mine Tailings/st. Joe Minerals Corp., 9.9 miles away.
• Largest share of modeled toxic air from industry: Metaltek International Inc. (53%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 45,599 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 63028

• Superfund sites nearbyF
• Factories and industrial sitesA to C
• Oil and gas wellsA to B
• Parks and nature nearbyC to D
• Air qualityB to C
• Drinking water qualityC to F
• Pesticide useC to F
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsA to F
• Noise levelsA to D
• Radiation signalsC to D

Based on 11 census tracts · compiled September 10, 2026 · how each grade works and its sources

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