Bryan County, OK

ZIP 74733

In ZIP 74733, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Bryan Co. Rwd #9 has 1 contaminant at or over an EPA legal limit; 12 contaminants are above health goals, led by thallium at 712× 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 (53%), mostly chromium.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 46,547 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 74733

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

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

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