Maricopa County, AZ

ZIP 85378

In ZIP 85378, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Epcor - Agua Fria meets every EPA legal limit; 13 contaminants are above health goals, led by lead at 88× California’s Public Health Goal.
• Nearest Superfund site: Luke Air Force Base, 8.7 miles away.
• Largest share of modeled toxic air from industry: Cornellcookson (75%), mostly chromium.
• Fine particles (PM2.5) average 8.8 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 85378

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsB to C
• Parks and nature nearbyC to F
• Air qualityC to F
• Drinking water qualityD to F
• Pesticide useC to D
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsC to D

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

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