Rio Arriba County, NM

ZIP 87578

In ZIP 87578, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ojo Sarco Mdwca meets every EPA legal limit; 4 contaminants are above health goals, led by nitrite at 10× https://pmc.ncbi.nlm.nih.gov/articles/PMC4535738/.
• Closer to Superfund sites than 69% 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 4.9 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 87578

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

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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