McClain County, OK

ZIP 73031

In ZIP 73031, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Blanchard meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 32× California’s Public Health Goal.
• Nearest Superfund site: Hardage/criner, 10.0 miles away.
• Largest share of modeled toxic air from industry: Oneok Field Svc/Maysville Gas Plt (48%), mostly formaldehyde.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 41,459 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 73031

• Superfund sites nearbyC
• Factories and industrial sitesA
• Oil and gas wellsF
• Parks and nature nearbyC
• Air qualityB
• Drinking water qualityD to F
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA
• Radiation signalsC

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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