Bioretention areas that store and treat runoff are filled with a soil mixture that supports water-tolerant plants. These devices take advantage of natural processes in soils and plants to remove pollutants from stormwater runoff through physical filtration, chemical adsorption, and biological decomposition. The end result is an attractive, landscaped area that cleans and retains stormwater runoff.

Rain Garden at Horry County Public Works Building

From NCDENR Stormwater BMP Manual

Bioretention section from SC Coastal LID Manual

For information about bioretention sizing, underdrain design, soil media, construction and maintenance, visit NCSU’s Bioretention website.

For information from SC DHEC’s BMP manual, click

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