San Juan County, UT

ZIP 84531

In ZIP 84531, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Glen Canyon Nra - Halls Crossing meets every EPA legal limit; 9 contaminants are above health goals, led by arsenic at 1,438× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Reladyne West Blanding Ut (99%), mostly xylene (mixed isomers).
• 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 84531

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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