McCurtain County, OK

ZIP 74740

In ZIP 74740, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Red River County Wsc meets every EPA legal limit; 10 contaminants are above health goals, led by lithium at 3.5× the USGS health-based screening level.
• 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: Setco Inc (49%), mostly chromium.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 47,693 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 74740

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

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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