AdvertisementEPA Connects 'Fracking' To Water ContaminationDecember 08, 2011Elizabeth ShogrenfacebookEmailA worker at Encana's Frenchie Draw gas-drilling rig in central Wyoming guides sections of steel pipe into an 11,000-foot well in 2009. The EPA on Thursday has tied contamination in drinking water to chemicals used in the drilling technique, called hydraulic fracturing, or "fracking." (Reuters /Landov)