Alamosa County, CO

ZIP 81101

In ZIP 81101, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Valley Mobile Home Llc has 2 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by arsenic at 3,098× 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: Alta Fuels Inc. (100%), mostly benzene.
• Fine particles (PM2.5) average 4.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 65,030 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 81101

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

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

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