Jefferson County, IA

ZIP 52540

In ZIP 52540, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Wellman Municipal Waterworks has 2 contaminants at or over an EPA legal limit; 9 contaminants are above health goals, led by bromodichloromethane at 56× California’s Public Health Goal.
• Nearest Superfund site: Fairfield Coal Gasification Plant, 6.1 miles away.
• Largest share of modeled toxic air from industry: Dexter Laundry Inc (65%), mostly chromium.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 286,602 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 52540

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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