Pottawatomie County, KS

ZIP 66520

In ZIP 66520, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Riley Co Rwd 1 meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 134× California’s Public Health Goal.
• Closer to Superfund sites than 54% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Jeffrey Energy Center (100%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 121,366 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 66520

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

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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