Eagle County, CO

ZIP 80423

In ZIP 80423, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Kremmling Town Of meets every EPA legal limit; 10 contaminants are above health goals, led by arsenic at 250× California’s Public Health Goal.
• Closer to Superfund sites than 53% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Climax Molybdenum Co Henderson Mill (100%), mostly chromium.
• Fine particles (PM2.5) average 4.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,337 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80423

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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