Maricopa County, AZ

ZIP 85545

In ZIP 85545, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Carefree Water Company meets every EPA legal limit; 10 contaminants are above health goals, led by lead at 39× 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: Freeport-Mcmoran Miami Inc (100%), mostly arsenic compounds.
• Fine particles (PM2.5) average 6.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,094,686 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 85545

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityA
• Drinking water qualityD to F
• Pesticide useC
• Neighborhood health statusD to F
• Past wildfire impactsD to F
• 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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