Johnson County, KS

ZIP 66210

In ZIP 66210, 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; 5 contaminants are above health goals, led by arsenic at 277× California’s Public Health Goal.
• Nearest Superfund site: Chemical Commodities, Inc., 6.0 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Harcros Chemicals Inc (77%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.7 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 66210

• Superfund sites nearbyA to D
• Factories and industrial sitesF
• Oil and gas wellsD to F
• Parks and nature nearbyC
• Air qualityD to F
• Drinking water qualityC
• Pesticide useB to D
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to D
• Radiation signalsF

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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