Fond du Lac County, WI

ZIP 54937

In ZIP 54937, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: North Fond Du Lac Waterworks meets every EPA legal limit; 10 contaminants are above health goals, led by lead at 32× California’s Public Health Goal.
• Closer to Superfund sites than 54% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Brunswick Corp Mercury Marine Div (46%), mostly chromium.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 180,045 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 54937

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

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

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