Johnson County, IA

ZIP 52340

In ZIP 52340, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Kesslers Homeowners Assn has 1 contaminant at or over an EPA legal limit; 2 contaminants are above health goals, led by lead at 36× California’s Public Health Goal.
• Closer to Superfund sites than 70% 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 (39%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.5 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 52340

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

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…