Marshall County, KS

ZIP 66508

In ZIP 66508, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Washington Co Rwd 1 meets every EPA legal limit; 10 contaminants are above health goals, led by arsenic at 487× 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: Landoll Corp (52%), mostly manganese compounds.
• Fine particles (PM2.5) average 6.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 310,939 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 66508

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

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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