Custer County, OK

ZIP 73639

In ZIP 73639, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Arapaho meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 49× 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: Miraclon Corp (97%), mostly methyl isobutyl ketone.
• Fine particles (PM2.5) average 6.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 65,559 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 73639

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsC to F
• Parks and nature nearbyC to D
• Air qualityA
• Drinking water qualityC to F
• Pesticide useF
• Neighborhood health statusC to F
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to F
• Radiation signalsC to D

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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