The Congaree River Basin (hydrologic unit 03050110) is located in Lexington, Richland, and Calhoun Counties, and encompasses 689 square miles. The 4 watersheds are predominately within the Sandhills region of the State, but giving way to the Upper Coastal Plain region near its confluence with the Wateree River of the Catawba River Basin. The urban land is comprised of the City of Columbia. Of the 441,010 acres in the Congaree River Basin, 34.6% is forested land, 26.6% is agricultural land, 19.0% is forested wetland (swamp), 17.9% is urban land, 0.3% is barren land, 1.3% is water, and 0.3% is nonforested wetland (marsh). The urban land percentage is comprised chiefly by the Greater Columbia Metropolitan area. The Broad River and Saluda River merge to form the Congaree River, which flows southeasterly for 50 miles and merges with the Wateree River to form the Santee River Basin. There are a total of 1,165 stream miles and 5,350 acres of lake waters in the Congaree River Basin.
For an overview of water quality in the Congaree Watershed, download the Congaree water quality assessment summary . For specific basin descriptions, facts, figures, and detailed maps click on a watershed below: