Washtenaw County, MI

ZIP 48118

In ZIP 48118, 3 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.
• 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: Michigan Seamless Tube LLC (46%), mostly chromium.
• Fine particles (PM2.5) average 7.1 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 48118

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

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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