Lake County, CO

ZIP 80461

In ZIP 80461, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Parkville Wd has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by arsenic at 500× California’s Public Health Goal.
• Nearest Superfund site: California Gulch, 2.6 miles away.
• Largest share of modeled toxic air from industry: Climax Molybdenum Co-Climax Mine (100%), mostly manganese compounds.
• Fine particles (PM2.5) average 3.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 126 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 80461

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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