Riley County, KS

ZIP 66502

In ZIP 66502, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Maple Hill, City Of meets every EPA legal limit; 11 contaminants are above health goals, led by lead at 51× California’s Public Health Goal.
• Closer to Superfund sites than 91% 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 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 76,274 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 66502

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

Based on 16 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…