Grant County, WI

ZIP 53820

In ZIP 53820, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Tennyson Waterworks meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 43× 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: Energizer Holdings Inc.-Fennimore (21%), mostly manganese.
• Fine particles (PM2.5) average 7.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 256,666 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 53820

• Superfund sites nearbyA to C
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyC to D
• Air qualityB
• Drinking water qualityC to F
• Pesticide useF
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC to D

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

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