The Environmental Protection Agency (EPA) says that levels of nitrate in drinking water at or above 10 parts per million are unsafe, particularly for infants, who could develop a potentially fatal blood disorder called "blue-baby" syndrome. The Interim Director for the Center for Health Effects of Environmental Contamination at the University of Iowa, Pete Weyer, says that the latest research shows negative health impacts—particularly cancer—for infants and even adults at a much lower limit.