Groups hope to force disclosure of 'fracking' chemicals in Wyoming

The groups filed the petition Friday in Wyoming's Seventh Judicial District Court. The petition asks the court to determine whether the commission is approving “chemical secrecy requests,” which exempts companies from revealing certain chemicals for proprietary reasons, in violation of the state’s 2010 disclosure rules.

The Environmental Protection Agency is currently studying the public health effects of fracking. A draft study released by the agency last year said fracking probably caused groundwater contamination in Wyoming. But the agency has warned against using the finding as a broader indictment of the drilling method.

Industry groups and other fracking supporters say the concerns are overblown.

The Interior Department is slated to issue new regulations for fracking on public lands, and the Environmental Protection Agency is studying the health effects of the practice.