Commissioners decide on a fix for the Dukeville water issue Zinc orthophospate the key to stopping lead and copper contamination Commissioners hope the introduction of zinc orthophosphate will stop lead and copper from seeping into the drinking water of some homes in one area of Rowan County. (Source: WBTV File) By David Whisenant | April 6, 2021 at 6:52 AM EDT - Updated April 6 at 8:06 AM ROWAN COUNTY, N.C. (WBTV) - Commissioners in Rowan County have decided on a plan that they hope will fix the issue of lead and copper found in some samples of drinking water in the Dukeville community off Long Ferry Road.