Barnwell County, SC

ZIP 29826

In ZIP 29826, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Williston Town Of (Sc0610002) has 2 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by di(2-ethylhexyl) phthalate at 56× California’s Public Health Goal.
• Closer to Superfund sites than 88% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: U.S. Doe Savannah River Ops (44%), mostly formaldehyde.
• Fine particles (PM2.5) average 6.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 118,477 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 29826

• Superfund sites nearbyF
• Factories and industrial sitesB
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityA
• Drinking water qualityC to D
• Pesticide useF
• Neighborhood health statusD
• Past wildfire impactsA
• Past flood impactsC
• Noise levelsA
• Radiation signalsC

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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