Adams County, CO

ZIP 80229

In ZIP 80229, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Thornton City Of has 2 contaminants at or over an EPA legal limit; 18 contaminants are above health goals, led by pfos at 4× California’s Public Health Goal.
• Nearest Superfund site: Woodbury Chemical Co., 2.1 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (79%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.4 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 80229

• Superfund sites nearbyF
• Factories and industrial sitesD to F
• Oil and gas wellsB to D
• Parks and nature nearbyC to F
• Air qualityC
• Drinking water qualityD to F
• Pesticide useD to F
• Neighborhood health statusB to D
• 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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