Denver County, CO

ZIP 80203

In ZIP 80203, 4 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; 9 contaminants are above health goals, led by bromodichloromethane at 121× California’s Public Health Goal.
• Nearest Superfund site: Denver Radium Site, 1.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (89%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.5 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 80203

• Superfund sites nearbyF
• Factories and industrial sitesC to D
• Oil and gas wellsB
• Parks and nature nearbyC
• Air qualityC
• Drinking water qualityB to C
• Pesticide useA to B
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsC to D
• Radiation signalsF

Based on 16 census tracts · compiled October 25, 2026 · how each grade works and its sources

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