Boulder County, CO

ZIP 80503

In ZIP 80503, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Pinewood Springs Wd meets every EPA legal limit; 10 contaminants are above health goals, led by pfos at 1.1× California’s Public Health Goal.
• Nearest Superfund site: Marshall Landfill, 9.0 miles away.
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (85%), 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 63,666 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80503

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

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

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