McDonald County, MO

ZIP 64856

In ZIP 64856, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Pea Ridge Waterworks meets every EPA legal limit; 6 contaminants are above health goals, led by trichloroacetic acid at 108× California’s Public Health Goal.
• Closer to Superfund sites than 86% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Simmons Foods (67%), mostly peracetic acid.
• Fine particles (PM2.5) average 7.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 14,492 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 64856

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

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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