The Maine legislature’s Health and Human Services Committee is considering a bill that would increase testing of Maine private wells, many of which contain bedrock that produces toxic chemicals such as arsenic at levels deemed unsafe by the U.S. Environmental Protection Agency. A 2014 study at Columbia University found that Maine children who were exposed to greater than five micrograms of arsenic per liter of household well water showed an IQ loss of five to six points. However, the current EPA standard for allowable levels of arsenic is 10 micrograms per liter, according to Assistant Professor of Environmental Studies Gail Carlson. “EPA recently revised and reported arsenic may be 17 times more potent a human carcinogen than previously believed,” she said.