Maricopa County, AZ

ZIP 85003

In ZIP 85003, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Phoenix City Of has 1 contaminant at or over an EPA legal limit; 16 contaminants are above health goals, led by lead at 14× California’s Public Health Goal.
• Nearest Superfund site: Nineteenth Avenue Landfill, 1.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Chemresearch Co. Inc. (78%), mostly chromium compounds.
• Fine particles (PM2.5) average 9.6 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 85003

• Superfund sites nearbyF
• Factories and industrial sitesF
• Oil and gas wellsB to C
• Parks and nature nearbyD to F
• Air qualityF
• Drinking water qualityD
• Pesticide useC to F
• Neighborhood health statusA to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsB to D
• Radiation signalsC to D

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

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