Attorneys general from Connecticut, Delaware, Maryland, Massachusetts, New York, Rhode Island, and Vermont issued a notice to the Environmental Protection Agency December 11 announcing plans to sue the agency for failure to directly regulate CH4 emissions in its performance standards for fracking operations. The states want the agency to set a CH4 performance standard for new natural gas wells and emissions guidelines for existing facilities. The agency issued a rule in August that phases in the performance standards for new and modified natural gas wells through 2015, when wells will be required to use reduced emissions completion equipment to capture emissions, but the rule does not directly regulate CH4. The Natural Resources Defense Council, Sierra Club, and Environmental Defense Fund filed a similar lawsuit recently in the U.S. Court of Appeals for the District of Columbia Circuit.