Saginaw County, MI

ZIP 48603

In ZIP 48603, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Thomas Township meets every EPA legal limit; 6 contaminants are above health goals, led by lead at 11× California’s Public Health Goal.
• Closer to Superfund sites than 93% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Trinseo Llc-Mi Operations (57%), mostly acrylonitrile.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 258,486 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 48603

• Superfund sites nearbyD to F
• Factories and industrial sitesC to D
• Oil and gas wellsA to D
• Parks and nature nearbyD to F
• Air qualityA to C
• Drinking water qualityC to D
• Pesticide useD to F
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC

Based on 11 census tracts · compiled September 10, 2026 · how each grade works and its sources

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