Duke University researchers announced October 15 that they had found high levels of arsenic, selenium, and other toxic substances from coal ash downstream from coal-fired power plant settling ponds in North Carolina. According to the study, published the following day in the Journal of Environmental Science and Technology, some of the highest levels of contamination above federal drinking water standards were found in coal ash pond effluents flowing into Mountain Island Lake, a primary drinking water source for Charlotte, NC. Additionally, high levels of cadmium, antimony, and thallium were detected in wastewaters affecting the state’s waters, and contaminants remain in high concentrations in solid waste residue and wastewater from the coal plants.