An EPA spokeswoman said Wednesday the agency would not comment on pending litigation. A coalition of US environmental groups has sued the Environmental Protection Agency ( EPA ) , claiming that the agency has not sufficiently regulated waste disposal connected to oil and gas exploration . The lawsuit focuses particularly on the disposal of waste water from fracking . Such waste is currently sent to underground wells ; a process that has been connected to an increased rate of earthquakes in states including Oklahoma , Colorado and Ohio . The lawsuit calls for a ban on the dumping of waste water in areas where it could pollute drinking water and landfills . Last year , the Obama administration passed measures intended to reduce the potential for water contamination as a result of fracking , however those measures only applied to fracking on federal lands .
A coalition of US environmental groups has sued the Environmental Protection Agency ( EPA ) , claiming that the agency has not sufficiently regulated waste disposal connected to oil and gas exploration . The lawsuit focuses particularly on the disposal of waste water from fracking . Such waste is currently sent to underground wells ; a process that has been connected to an increased rate of earthquakes in states including Oklahoma , Colorado and Ohio . The lawsuit calls for a ban on the dumping of waste water in areas where it could pollute drinking water and landfills . Last year , the Obama administration passed measures intended to reduce the potential for water contamination as a result of fracking , however those measures only applied to fracking on federal lands .