Arapahoe County, CO

ZIP 80122

In ZIP 80122, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Highlands Ranch Wsd meets every EPA legal limit; 18 contaminants are above health goals, led by arsenic at 469× California’s Public Health Goal.
• Nearest Superfund site: Denver Radium Site, 9.3 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (93%), 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 41,186 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80122

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

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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