Marion County, SC

ZIP 29571

In ZIP 29571, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Marco Rural Water Co (Sc3320001) meets every EPA legal limit; 8 contaminants are above health goals, led by dibromochloromethane at 117× 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: Nan Ya Plastics Corp America (34%), mostly acetaldehyde.
• Fine particles (PM2.5) average 6.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 154,878 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 29571

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

Based on 6 census tracts · compiled October 25, 2026 · how each grade works and its sources

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