Studies find methane in Pa. drinking water

Associated Press
Studies find methane in Pa. drinking water

FILE - In this file photo from Oct. 14, 2011, a drilling rig is seen in Springville, Pa. State regulators blamed faulty gas wells drilled for leaking methane into the groundwater in nearby Dimock, Pa. It was the first serious case of methane migration said to be related to the Pennsylvania Marcellus Shale gas field drilling boom. New research in this area of Pennsylvania demonstrates that it's hard to nail down how often natural gas drilling is contaminating drinking water. One study found high levels of methane in some water wells within a half-mile of gas wells, while another found some serious methane pollution occurring naturally, far away from drilling. (AP Photo/Alex Brandon, FILE)

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