Stephens County, OK

ZIP 73055

In ZIP 73055, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Stephens Co Rwd #5 meets every EPA legal limit; 11 contaminants are above health goals, led by arsenic at 516× California’s Public Health Goal.
• Nearest Superfund site: Oklahoma Refining Co., 7.4 miles away.
• Largest share of modeled toxic air from industry: Halliburton Manufacturing & Leasing Co LLC (82%), mostly chromium.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 35,231 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 73055

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

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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