Boulder County, CO

ZIP 80310

In ZIP 80310, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Boulder City Of meets every EPA legal limit; 5 contaminants are above health goals, led by chloroform at 66× California’s Public Health Goal.
• Nearest Superfund site: Marshall Landfill, 4.5 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (87%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 17,327 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80310

• Superfund sites nearbyD
• Factories and industrial sitesC to D
• Oil and gas wellsA to C
• Parks and nature nearbyB to C
• Air qualityB
• Drinking water qualityC
• Pesticide useB
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsD
• Noise levelsA to D
• Radiation signalsD

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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