McCormick County, SC

ZIP 29840

In ZIP 29840, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mccormick Co W&sa (Sc3520002) meets every EPA legal limit; 9 contaminants are above health goals, led by pfos at 4× California’s Public Health Goal.
• Nearest Superfund site: Barite Hill/nevada Goldfields, 9.0 miles away.
• Largest share of modeled toxic air from industry: Stoll Industries Inc. (92%), mostly chromium.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,593 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 29840

• Superfund sites nearbyD
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyA
• Air qualityB
• Drinking water qualityC
• Pesticide useD
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsA

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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