Boulder County, CO

ZIP 80540

In ZIP 80540, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Annunciation Heights meets every EPA legal limit; 9 contaminants are above health goals, led by bromodichloromethane at 222× California’s Public Health Goal.
• Nearest Superfund site: Captain Jack Mill, 5.7 miles away.
• Largest share of modeled toxic air from industry: Cemex Construction Materials South LLC (55%), mostly chromium compounds.
• Fine particles (PM2.5) average 5.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 63,666 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80540

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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