Shawnee County, KS

ZIP 66604

In ZIP 66604, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Shawnee Co Rwd 1c meets every EPA legal limit; 9 contaminants are above health goals, led by lead at 19× California’s Public Health Goal.
• Nearest Superfund site: Hydro-Flex Inc., 2.2 miles away.
• Largest share of modeled toxic air from industry: American Phoenix Inc. - Topeka Ks (39%), mostly cobalt compounds.
• Fine particles (PM2.5) average 8.3 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 66604

• Superfund sites nearbyA
• Factories and industrial sitesC
• Oil and gas wellsA to B
• Parks and nature nearbyD to F
• Air qualityB to D
• Drinking water qualityD
• Pesticide useD to F
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…