Houghton County, MI

ZIP 49931

In ZIP 49931, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Houghton meets every EPA legal limit; 4 contaminants are above health goals, led by lead at 12× California’s Public Health Goal.
• Closer to Superfund sites than 84% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Calumet Electronics Corp (67%), mostly formaldehyde.
• Fine particles (PM2.5) average 4.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,356 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 49931

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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