Oneida County, WI

ZIP 54539

In ZIP 54539, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hiawatha Mh Est Old Office meets every EPA legal limit; 2 contaminants are above health goals, led by arsenic at 444× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Harley-Davidson Tomahawk Kaphaem Facility (61%), mostly diisocyanates.
• Fine particles (PM2.5) average 5.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 30,024 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 54539

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

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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