Washtenaw County, MI

ZIP 48198

In ZIP 48198, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ann Arbor meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 975× 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: Basf Corp (20%), mostly chromium.
• Fine particles (PM2.5) average 8.1 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 48198

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

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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