Trempealeau County, WI

ZIP 54661

In ZIP 54661, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Country Road Estates meets every EPA legal limit; 3 contaminants are above health goals, led by arsenic at 219× California’s Public Health Goal.
• Nearest Superfund site: Onalaska Municipal Landfill, 2.3 miles away.
• Largest share of modeled toxic air from industry: Gea Farm Technologies Inc. (81%), mostly chromium.
• Fine particles (PM2.5) average 6.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 129,559 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 54661

• Superfund sites nearbyC to D
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityB to C
• Pesticide useD to F
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to F

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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