Grant County, WI

ZIP 53811

In ZIP 53811, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Dubuque Water Works has 2 contaminants at or over an EPA legal limit; 8 contaminants are above health goals, led by chloroform at 77× California’s Public Health Goal.
• Nearest Superfund site: Peoples Natural Gas Co., 5.8 miles away.
• Largest share of modeled toxic air from industry: East Dubuque Nitrogen Fertilizers LLC (74%), mostly formaldehyde.
• Fine particles (PM2.5) average 6.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 204,717 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 53811

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

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

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