Washtenaw County, MI

ZIP 48170

In ZIP 48170, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ann Arbor has 1 contaminant at or over an EPA legal limit; 8 contaminants are above health goals, led by pfos at 43× 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 (22%), mostly chromium compounds.
• 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 sitesC to D
• Oil and gas wellsB to D
• Parks and nature nearbyC to F
• Air qualityC to F
• Drinking water qualityB to F
• Pesticide useB to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources

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