Ingham County, MI

ZIP 48840

In ZIP 48840, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Williamston, City Of meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 556× California’s Public Health Goal.
• Nearest Superfund site: Motor Wheel, Inc., 6.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Symmetry Medical Inc Lansing (51%), mostly cobalt.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 163,688 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 48840

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

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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