Jefferson County, IA

ZIP 52556

In ZIP 52556, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Jefferson County Rural Water District meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 60× California’s Public Health Goal.
• Nearest Superfund site: Fairfield Coal Gasification Plant, 1.5 miles away.
• Largest share of modeled toxic air from industry: Dexter Laundry Inc (66%), mostly chromium.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 163,010 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 52556

• Superfund sites nearbyC to F
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityB
• Drinking water qualityA to F
• Pesticide useF
• Neighborhood health statusC to D
• Past wildfire impactsA
• Past flood impactsF
• Noise levelsA to D
• Radiation signalsD

Based on 5 census tracts · compiled September 10, 2026 · how each grade works and its sources

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