San Juan County, UT

ZIP 84534

In ZIP 84534, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Todahaidekani NTUA has 1 contaminant at or over an EPA legal limit; 2 contaminants are above health goals, led by arsenic at 2,505× California’s Public Health Goal.
• Closer to Superfund sites than 95% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Lisbon Valley Mining Co LLC (100%), mostly sulfuric acid.
• Fine particles (PM2.5) average 4.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 34,196 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 84534

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

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

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