Jefferson County, CO

ZIP 80235

In ZIP 80235, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Denver Water Board meets every EPA legal limit; 13 contaminants are above health goals, led by arsenic at 206× California’s Public Health Goal.
• Nearest Superfund site: Denver Radium Site, 7.7 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (95%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,980 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80235

• Superfund sites nearbyD
• Factories and industrial sitesD
• Oil and gas wellsA to B
• Parks and nature nearbyC to F
• Air qualityB to C
• Drinking water qualityD
• Pesticide useA to C
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsD

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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