Genesee County, MI

ZIP 48503

In ZIP 48503, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Genesee County Water System has 1 contaminant at or over an EPA legal limit; 4 contaminants are above health goals, led by arsenic at 3,252× 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: Gm Truck Group Flint Assembly Plant (92%), mostly benzene.
• Fine particles (PM2.5) average 8.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 122,888 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 48503

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsC to D
• Parks and nature nearbyD to F
• Air qualityD
• Drinking water qualityC to F
• Pesticide useD
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC

Based on 16 census tracts · compiled September 10, 2026 · how each grade works and its sources

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