Pima County, AZ

ZIP 85321

In ZIP 85321, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Why Dwid has 1 contaminant at or over an EPA legal limit; 5 contaminants are above health goals, led by arsenic at 3,547× California’s Public Health Goal.
• Closer to Superfund sites than 60% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: U.S. Dod Usaf Barry M. Goldwater Range (59%), mostly lead compounds.
• Fine particles (PM2.5) average 6.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 77,498 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 85321

• Superfund sites nearbyA to D
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA
• Drinking water qualityC to F
• Pesticide useC
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsD

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

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