Disturbing one acre or more in Dorchester County requires state stormwater and sediment control permit coverage before ground breaks, administered under South Carolina's Stormwater Management and Sediment Reduction Act.
Construction stormwater in Dorchester County follows the South Carolina Stormwater Management and Sediment Reduction Act, S.C. Code Section 48-14-10 et seq. Any land disturbance of one acre or more, or a smaller lot inside a larger common plan of development, needs coverage under the state NPDES construction general permit before work begins, with a Stormwater Pollution Prevention Plan usually sealed by a South Carolina licensed engineer. The Department of Environmental Services (SCDES), which took over DHEC's environmental programs in 2024, is the permitting authority. Dorchester County also runs a regulated MS4 stormwater program, with Summerville and North Charleston inside the Charleston urbanized area. Flat Lowcountry terrain and high water tables make on-site detention and infiltration essential.
Disturbing an acre without permit coverage draws stop-work orders and civil penalties up to one thousand dollars per day, plus mandatory installation of controls at the developer's expense. Each day is a separate violation.
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Dorchester County, SC
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See how Dorchester County's stormwater management rules stack up against other locations.
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