Okmulgee County, OK

ZIP 74421

In ZIP 74421, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Okmulgee Co. Rwd #6 (Hectorville) meets every EPA legal limit; 9 contaminants are above health goals, led by bromodichloromethane at 368× California’s Public Health Goal.
• Nearest Superfund site: Wilcox Oil Company, 8.3 miles away.
• Largest share of modeled toxic air from industry: Sterling Specialty Chemicals LLC (70%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 43,254 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 74421

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

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

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