Jefferson County, MO

ZIP 63028

In ZIP 63028, 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: Big River Mine Tailings/st. Joe Minerals Corp., 9.9 miles away.
• Largest share of modeled toxic air from industry: Holcim (US) Inc. - Ste. Genevieve Plant (35%), 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 B
• Oil and gas wellsA to B
• Parks and nature nearbyB to C
• Air qualityB to C
• Drinking water qualityA to F
• Pesticide useB to D
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA to F
• Noise levelsA to D
• Radiation signalsC to D

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…