The Waccamaw River Basin (hydrologic unit 03040206) is located in Horry and Georgetown Counties, and encompasses 5 watersheds and 598 square miles. The Waccamaw River Basin incorporates the Lower Coastal Plain and Coastal Zone regions and the AIWW flows through the Coastal Zone region. Of the 382,983 acres, 39.3% is forested wetland (swamp), 22.1% is forested land, 15.4% is urban land, 14.8% is agricultural land, 5.1% is nonforested wetland (marsh), 2.7% is water, and 0.6% is barren land. The urban land percentage is comprised chiefly of the Cities of Conway, Georgetown, Myrtle Beach, and North Myrtle Beach. There are approximately 784 stream miles, 2,373 acres of lake waters, and 22,910 acres of estuarine areas in this watershed.
The Waccamaw River flows across the South Carolina state line from North Carolina and accepts drainage from Kingston Lake and the AIWW via Socastee Creek. The Waccamaw River then joins the Great Pee Dee River as it forms Winyah Bay and drains into the Atlantic Ocean.
For an overview of water quality in the Waccamaw River Watershed, download the water quality assessment summary. For specific basin descriptions, facts, figures, and detailed maps click on a watershed below.