Jefferson County, CO

ZIP 80425

In ZIP 80425, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mountain Wsd has 2 contaminants at or over an EPA legal limit; 12 contaminants are above health goals, led by pfhxs at 3.4× California Notification Level.
• Nearest Superfund site: Air Force Plant Pjks, 3.0 miles away.
• Largest share of modeled toxic air from industry: Terumo Bct Sterilization Services Inc (93%), mostly ethylene oxide.
• Fine particles (PM2.5) average 4.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,017 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80425

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

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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