A North Carolina appeals court should keep alive a five-year-old lawsuit because it increases the pressure on Duke Energy Corp. to clean up groundwater contaminated by its coal ash pits, environmental lawyers argued Thursday.
The Charlotte-based electricity utility admits coal ash has tainted underground water supplies, but says the potentially toxic brew hasn't harmed neighbors using water wells. Coal ash, the residue left after decades of burning coal to generate power, can contain toxic materials like arsenic and mercury.