Marshall County, OK

ZIP 73440

In ZIP 73440, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Marshall County Rural Water District #2 has 1 contaminant at or over an EPA legal limit; 16 contaminants are above health goals, led by lead at 32× 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: Cm Truck Beds - Madill (76%), mostly chromium.
• Fine particles (PM2.5) average 7.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 15,560 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 73440

• Superfund sites nearbyA
• Factories and industrial sitesB to C
• Oil and gas wellsF
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsB

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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