The U.S. Environmental Protection Agency said for the first time it found chemicals used in extracting natural gas through hydraulic fracturing in a drinking-water aquifer in west-central Wyoming.
Samples taken from two deep water-monitoring wells near a gas field in Pavillion, Wyoming, showed synthetic chemicals such as glycols and alcohols “consistent with gas production and hydraulic-fracturing fluids,” the agency said today in an e- mailed statement.
The U.S. gets about one-third of its gas from fracturing, or fracking, in which millions of gallons of chemically treated water and sand are forced underground to break rock and let trapped vapor flow. The findings give ammunition to environmental groups, such as the Natural Resources Defense Council, that have said the drilling risks tainting drinking water and needs stronger regulation.
“This is just evidence of why we need better rules,” Amy Mall, senior policy analyst for the group in Washington, said in an interview. “It’s a game-changer. EPA experts and scientists have recognized that there is real contamination, that there is a real scientific basis for linking it to fracking.”
After complaints from residents of Pavillion, about 230 miles (370 kilometers) northeast of Salt Lake City, the EPA began investigating private drinking-water wells about three years ago. Calgary-based Encana Corp. (ECA), Canada’s largest natural- gas producer, owns about 150 wells in Pavillion, according to spokesman Doug Hock.
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