Sugar Creek enters the Catawba River downstream of Charlotte, NC in York County, SC. Sediment and trash enter the Catawba River here more than any other place along the Catawba River, as Sugar Creek collects sediment and trash from the rapidly-developing urban environment. American Rivers, the river watchdog group, named the Catawba River "America's Most Threatened River" in 2008, largely because of sediment, which chokes oxygen, introduces bad nutrients and compromises water quality.