Mason County, MI

ZIP 49402

In ZIP 49402, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Baldwin, Village Of meets every EPA legal limit; 3 contaminants are above health goals, led by pfoa at 314× California’s Public Health Goal.
• Nearest Superfund site: Wash King Laundry, 4.8 miles away.
• Largest share of modeled toxic air from industry: Howmet Corp - Plants 1& 3 (59%), mostly cobalt.
• Fine particles (PM2.5) average 5.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 359,087 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 49402

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

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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