Adams County, CO

ZIP 80234

In ZIP 80234, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Broomfield City And County Of meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 99× California’s Public Health Goal.
• Nearest Superfund site: Broderick Wood Products, 5.2 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (84%), 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 165,365 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80234

• Superfund sites nearbyA to F
• Factories and industrial sitesC to D
• Oil and gas wellsB to F
• Parks and nature nearbyB to C
• Air qualityC
• Drinking water qualityC
• Pesticide useC to D
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD to F

Based on 10 census tracts · compiled October 25, 2026 · how each grade works and its sources

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