Washtenaw County, MI

ZIP 48105

In ZIP 48105, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Dexter meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 837× California’s Public Health Goal.
• Nearest Superfund site: Spiegelberg Landfill, 5.3 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Michigan Seamless Tube LLC (31%), mostly chromium.
• Fine particles (PM2.5) average 8.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 123,801 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 48105

• Superfund sites nearbyA to D
• Factories and industrial sitesB to D
• Oil and gas wellsB to D
• Parks and nature nearbyB to C
• Air qualityB to D
• Drinking water qualityA to C
• Pesticide useC to D
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 18 census tracts · compiled October 25, 2026 · how each grade works and its sources

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