Charleston County, SC

ZIP 29455

In ZIP 29455, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: St John's Water (Sc1020002) has 2 contaminants at or over an EPA legal limit; 11 contaminants are above health goals, led by pfos at 7.2× California’s Public Health Goal.
• Nearest Superfund site: Geiger (c & M Oil), 5.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Lanxess Corp (35%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 199,042 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 29455

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

Based on 11 census tracts · compiled September 10, 2026 · how each grade works and its sources

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