Johnson County, IA

ZIP 52242

In ZIP 52242, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Iowa City Water Department meets every EPA legal limit; 14 contaminants are above health goals, led by pfos at 2.4× California’s Public Health Goal.
• Closer to Superfund sites than 87% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Adm Corn Processing (40%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 229,923 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 52242

• Superfund sites nearbyF
• Factories and industrial sitesD
• Oil and gas wellsA
• Parks and nature nearbyD
• Air qualityC to D
• Drinking water qualityD
• Pesticide useD to F
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsF
• Noise levelsC to D
• Radiation signalsD

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

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