Exhibit 21 Direct and Indirect Wholly-Owned Subsidiaries of Waste Industries USA, Inc. - --------------------------------------------------------------------------- Black Bear Disposal, LLC CLD of Nashville, LLC Duplin County Disposal, LLC ECO Services, LLC Laurens County Landfill, LLC Moss Point Disposal, LLC Old Kings Road Solid Waste, LLC Railroad Avenue Disposal, LLC Red Rock Disposal, LLC Reliable Trash Service, LLC S & S Enterprises of Mississippi, LLC Safeguard Landfill Management, LLC Sampson County Disposal, LLC Shamrock Environmental Services, LLC Southern Waste of Alabama, LLC Southern Waste Services of Mississippi, LLC TransWaste Services, LLC Van Buren County Landfill, LLC WasteCo, LLC Waste Industries, LLC Waste Industries LandCo, LLC Waste Industries of Mississippi, LLC Waste Industries of Tennessee, LLC Waste Industries Property Co., LLC Waste Services of Decatur, LLC Waste Services of Memphis, LLC Waste Services of North Carolina, LLC Waste Services of Tennessee, LLC