North Carolina Division of Water Quality filed suit against Duke Energy on May 20 over coal ash pond leaks at two facilities. The state alleged that illegal discharges came from ash ponds at facilities in Asheville and Riverbend resulting in state groundwater violations. The amended suit, filed in the North Carolina Superior Court for Wake County, asked for a court order instructing Duke to end the groundwater contamination. While the Riverbend facility stopped operations in April, the Asheville facility remains in use.