Colleton County, SC

ZIP 29945

In ZIP 29945, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ridgeland Town Of (2710001) meets every EPA legal limit; 7 contaminants are above health goals, led by bromodichloromethane at 115× California’s Public Health Goal.
• Nearest Superfund site: Wamchem, Inc., 7.2 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Balchem Corp (90%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 121,809 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 29945

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

Based on 5 census tracts · compiled October 25, 2026 · how each grade works and its sources

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