Archuleta County, CO

ZIP 81147

In ZIP 81147, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: San Juan Ranch Estates Association, Inc meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 855× California’s Public Health Goal.
• Nearest Superfund site: Nelson Tunnel/commodore Waste Rock, 0.7 miles away.
• 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 81147

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

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

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