Archuleta County, CO

ZIP 81128

In ZIP 81128, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Navajo River Ranch Poa meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 190× 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.
• Fine particles (PM2.5) average 3.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 3,032 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 81128

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

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

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