We've reported previously on the investigation undertaken by U.S. EPA to try to link groundwater contamination to hydraulic fracturing in Pavillion, Wyoming (see here and here, e.g.).  Yesterday, U.S. EPA announced that it would discontinue that investigation in favor of the State of Wyoming:  "EPA has announced that it will be supporting the State of Wyoming in its further investigation of drinking water quality in the rural area east of Pavillion, Wyoming. While EPA stands behind its work and data, the agency recognizes the State of Wyoming’s commitment to further investigation and efforts to provide clean water and does not plan to finalize or seek peer review of its draft Pavillion groundwater report released in December 2011."  (See here.)

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