Jefferson County, MO

ZIP 63012

In ZIP 63012, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hillsboro Pws has 1 contaminant at or over an EPA legal limit; 3 contaminants are above health goals, led by cadmium at 289× California’s Public Health Goal.
• Nearest Superfund site: Southwest Jefferson County Mining, 8.6 miles away.
• Largest share of modeled toxic air from industry: Metaltek International Inc. (96%), mostly chromium compounds.
• Fine particles (PM2.5) average 7.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 17,788 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 63012

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

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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