Boulder County, CO
ZIP 80020
In ZIP 80020, 7 of the 12 things we check have at least one part graded D or F.
- Drinking water: Maple Grove Wd has 1 contaminant at or over an EPA legal limit; 7 contaminants are above health goals, led by di(2-ethylhexyl) phthalate at 57× California’s Public Health Goal.
- Nearest Superfund site: Marshall Landfill, 3.7 miles away (2 within 10 miles).
- Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (84%), mostly ethylene oxide.
- Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
- About 4,764 kg of agricultural pesticides are applied in the county each year.
Grades for ZIP 80020
- Superfund sites nearbyA to F
- Factories and industrial sitesA to C
- Oil and gas wellsB to F
- Parks and nature nearbyC to F
- Air qualityA to C
- Drinking water qualityC to D
- Pesticide useB to D
- Neighborhood health statusA to C
- Past wildfire impactsA
- Past flood impactsA to C
- Noise levelsA to D
- Radiation signalsD to F
Based on 22 census tracts · compiled September 10, 2026 · how each grade works and its sources
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