Boulder County, CO

ZIP 80305

In ZIP 80305, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Table Mesa Village Mhp meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 99× California’s Public Health Goal.
• Nearest Superfund site: Marshall Landfill, 0.5 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (85%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.7 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 80305

• Superfund sites nearbyD to F
• Factories and industrial sitesD
• Oil and gas wellsA to B
• Parks and nature nearbyA to B
• Air qualityA to B
• Drinking water qualityC
• Pesticide useB to D
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsC to D
• Noise levelsA to B
• Radiation signalsD to F

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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