The South Carolina portion of the Catawba River Basin (hydrologic units 03050101 and 03050103) is located in York, Lancaster, Chester, and Fairfield Counties, and encompasses 1,067 square miles that extend across the Piedmont region. The Catawba River Basin encompasses 7 watersheds and 682,634 acres of which 59.5% is forested land, 22.9% is agricultural land, 14.2% is urban land, 2.1% is water, 0.9% is forested wetland, and 0.4% is barren land. There are a total of 4,800.0 stream miles, and 16,504.5 acres of lake waters (14,535.6 acres within South Carolina).
The Catawba River originates in North Carolina and flows through Lake Wylie and into South Carolina. Allison Creek flows into the midlake region of Lake Wylie within South Carolina. The Catawba River flows out of Lake Wylie and is joined by Sugar Creek, Twelvemile Creek, and Cane Creek before draining into Fishing Creek Reservoir. The Catawba River flows out of Fishing Creek Reservoir and joins with Fishing Creek and flows into Great Falls Reservoir. The river then joins with Camp Creek and Rocky Creek to form Cedar Creek Reservoir. Cedar Creek flows into the Catawba River just below the Cedar Creek Reservoir dam. The Catawba River merges with Big Wateree Creek to form the Wateree River Basin.
For an overview of water quality in the Catawba River Watershed, download the Catawba water quality assessment summary . For specific basin descriptions, facts, figures, and detailed maps click on a watershed below: