Pinal County, AZ

ZIP 85137

In ZIP 85137, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mammoth Town Of meets every EPA legal limit; 2 contaminants are above health goals, led by arsenic at 2,077× California’s Public Health Goal.
• Closer to Superfund sites than 59% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Freeport-Mcmoran Miami Inc (99%), mostly arsenic compounds.
• Fine particles (PM2.5) average 5.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 812,658 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 85137

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

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

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