Jefferson County, CO
ZIP 80401
In ZIP 80401, 6 of the 12 things we check have at least one part graded D or F.
- Drinking water: Mt Vernon Country Club has 1 contaminant at or over an EPA legal limit; 11 contaminants are above health goals, led by pfos at 2.2× California’s Public Health Goal.
- Closer to Superfund sites than 85% of U.S. neighborhoods, with no listed site within 10 miles of its center.
- Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (91%), mostly ethylene oxide.
- Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 1,017 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 80401
- Superfund sites nearbyD to F
- Factories and industrial sitesB to F
- Oil and gas wellsA to C
- Parks and nature nearbyB to F
- Air qualityA to B
- Drinking water qualityC to F
- Pesticide useA to B
- Neighborhood health statusA to C
- Past wildfire impactsA
- Past flood impactsA
- Noise levelsA to D
- Radiation signalsD to F
Based on 18 census tracts · compiled September 10, 2026 · how each grade works and its sources
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