In this Nov. 27, 2012 photo, a well vent burns as water flows from Steve Lipsky's well outside his family's home in rural Parker County near Weatherford, Texas. The U.S. Environmental

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In this Nov. 27, 2012 photo, a well vent burns as water flows from Steve Lipsky's well outside his family's home in rural Parker County near Weatherford, Texas. The U.S. Environmental Protection Agency had evidence a gas company's drilling operation contaminated Lipsky's drinking water with explosive methane, and possibly cancer-causing chemicals, but withdrew its enforcement action, leaving the family with no useable water supply, according to a report obtained by The Associated Press. The EPA's decision to roll back its initial claim that hydraulic fracturing, or ìfracking,î operations had contaminated the water is the latest case in which the federal agency initially linked drilling to water contamination and then softened its position, drawing criticism from Republicans and industry officials who insisted they proved the agency was inefficient and too quick to draw conclusions. (AP Photo/LM Otero) less