Cass County, MI

ZIP 49120

In ZIP 49120, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ontario Place meets every EPA legal limit; 2 contaminants are above health goals, led by arsenic at 750× California’s Public Health Goal.
• Nearest Superfund site: Douglas Road/uniroyal, Inc., Landfill, 4.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Kennametal Stellite LP (85%), mostly cobalt.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 209,214 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 49120

• Superfund sites nearbyC to F
• Factories and industrial sitesA to D
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA to B
• Drinking water qualityA to C
• Pesticide useD to F
• Neighborhood health statusD to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsA to D

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

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