Charleston County's Livability chapter has no separate industrial decibel schedule; industrial and commercial noise is judged against the same Section 3-43 standard — excessive, unnecessary or unreasonable sound above 70 dBA or plainly audible within 500 feet of a residential property line.
The unincorporated county does not publish an industrial zoning-boundary dB table. Instead, plants, warehouses and commercial operations are subject to the general excessive-noise rule (Section 3-43): sound above 70 dBA, or plainly audible within 500 feet of a residentially developed parcel, is prohibited. Where an operation abuts residential land on the sea islands or rural county, that 500-foot residential-line test governs. Land-use compatibility and buffering are separately addressed through the Charleston County Zoning and Land Development Regulations (ZLDR).
Industrial or commercial noise violating Section 3-43 is a misdemeanor subject to a fine of up to $500.00; ZLDR zoning enforcement may apply separately.
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