Jefferson County, CO

ZIP 80033

In ZIP 80033, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Arvada City Of meets every EPA legal limit; 13 contaminants are above health goals, led by arsenic at 350× California’s Public Health Goal.
• Nearest Superfund site: Denver Radium Site, 4.0 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (92%), 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 1,017 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80033

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

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

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