Johnson County, KS

ZIP 66031

In ZIP 66031, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Olathe, City Of meets every EPA legal limit; 14 contaminants are above health goals, led by lead at 16× California’s Public Health Goal.
• Nearest Superfund site: Chemical Commodities, Inc., 6.4 miles away.
• Largest share of modeled toxic air from industry: Harcros Chemicals Inc (59%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.1 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 66031

• Superfund sites nearbyD
• Factories and industrial sitesD
• Oil and gas wellsF
• Parks and nature nearbyD
• Air qualityB
• Drinking water qualityD
• Pesticide useD
• Neighborhood health statusB
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA
• Radiation signalsD

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…