Reuters: Preliminary water tests from rivers near a huge coal ash spill in Tennessee show elevated levels of pollutants such as mercury and lead, a environmental group said on Friday. “We’re concerned that the water poses a greater risk to residents in the area than has been revealed so far,” said Matt Wasson, a program director at Appalachian Voices, a environmental group that coordinated the testing of the water with scientists from Appalachian State University. An earthen dike …