Marathon County, WI

ZIP 54411

In ZIP 54411, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Westboro San Dist 1 meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 134× California’s Public Health Goal.
• Nearest Superfund site: Unity Auto Mart, 7.1 miles away.
• Largest share of modeled toxic air from industry: Veritas Steel (43%), mostly chromium.
• Fine particles (PM2.5) average 6.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 61,383 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 54411

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

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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