Rio Arriba County, NM

ZIP 87523

In ZIP 87523, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Greater Chimayo Mdwca has 2 contaminants at or over an EPA legal limit; 13 contaminants are above health goals, led by dichloromethane at 22× California’s Public Health Goal.
• Closer to Superfund sites than 55% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: U.S. Department Of Energy Los Alamos National Laboratory (100%), mostly lead.
• Fine particles (PM2.5) average 4.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 31,004 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 87523

• Superfund sites nearbyC
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityA
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusC
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsF

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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