Shawnee County, KS

ZIP 66539

In ZIP 66539, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Shawnee Co Rwd 4c meets every EPA legal limit; 9 contaminants are above health goals, led by arsenic at 204× California’s Public Health Goal.
• Nearest Superfund site: Hydro-Flex Inc., 9.7 miles away.
• Largest share of modeled toxic air from industry: Jeffrey Energy Center (59%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 103,017 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 66539

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsA to B
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityB to C
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsF

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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