Nemaha County, KS

ZIP 66550

In ZIP 66550, 6 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.
• Closer to Superfund sites than 0% 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 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 260,113 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 66550

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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