Williamsburg County, SC

ZIP 29556

In ZIP 29556, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Bgwc Rock Bluff S/D (4550001) meets every EPA legal limit; 8 contaminants are above health goals, led by bromodichloromethane at 83× 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 (55%), mostly acetaldehyde.
• Fine particles (PM2.5) average 6.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 269,952 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 29556

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

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

Loading the full report, with every source…