The Black River Basin (hydrologic unit 03040205) is located in Kershaw, Lee, Sumter, Clarendon, Florence, Williamsburg, and Georgetown Counties, and encompasses 2,061 square miles with geographic regions extending from the Sandhills to the Upper and Lower Coastal Plains and into the Coastal Zone. The Black River Basin encompasses 18 watersheds, some 1.3 million acres of which 31.4% is forested wetland, 29.6% is forested land, 29.6% is agricultural land, 6.6% is urban land, 2.2% is nonforested wetland, 0.1% is barren land, and 0.5% is water. The urban land percentage is comprised chiefly of the City of Sumter. There are approximately 2,143 stream miles, 2,332 acres of lake waters, and 763 acres of estuarine areas in the Black River Basin.
The Black River originates near the City of Bishopville and accepts drainage from Rocky Bluff Swamp, the Pocotaligo River, Pudding Swamp, Kingstree Swamp Canal, and Black Mingo Creek before merging with the Great Pee Dee River.
For an overview of water quality in the Black River Watershed, download the water quality assessment summary. For specific basin descriptions, facts, figures, and detailed maps click on a watershed below. For specific basin descriptions, facts, figures, and detailed maps click on a watershed below.