Darlington County, SC

ZIP 29550

In ZIP 29550, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Florence City Of (Sc2110001) meets every EPA legal limit; 9 contaminants are above health goals, led by pfos at 2.5× California’s Public Health Goal.
• Nearest Superfund site: Galey and Lord Plant, 6.1 miles away.
• Largest share of modeled toxic air from industry: Nucor Steel-Darlington (38%), mostly chromium compounds.
• Fine particles (PM2.5) average 6.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 195,258 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 29550

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

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…