Washtenaw County, MI

ZIP 48170

In ZIP 48170, 8 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.
• Nearest Superfund site: Rasmussen's Dump, 9.6 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Tower Automotive Plymouth (80%), mostly manganese.
• Fine particles (PM2.5) average 9.0 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 48170

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

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

Loading the full report, with every source…