Johnson County, KS

ZIP 66221

In ZIP 66221, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Miami Co Rwd 2 meets every EPA legal limit; 12 contaminants are above health goals, led by lead at 24× California’s Public Health Goal.
• Nearest Superfund site: Chemical Commodities, Inc., 5.1 miles away.
• Largest share of modeled toxic air from industry: Harcros Chemicals Inc (73%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 49,881 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 66221

• Superfund sites nearbyC to D
• Factories and industrial sitesD to F
• Oil and gas wellsD to F
• Parks and nature nearbyD to F
• Air qualityB to F
• Drinking water qualityD
• Pesticide useC to D
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to B
• Radiation signalsD

Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources

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