WASHINGTON — The U.S. Environmental Protection Agency is announcing a schedule to develop standards for wastewater discharges produced by natural gas extraction from underground coalbed and shale formations.
No comprehensive set of national standards exists at this time for the disposal of wastewater discharged from natural gas extraction activities, and over the coming months EPA will begin the process of developing a proposed standard with the input of stakeholders — including industry and public health groups.
Shale gas standards
Currently, wastewater associated with shale gas extraction is prohibited from being directly discharged to waterways and other waters of the U.S. While some of the wastewater from shale gas extraction is reused or re-injected, a significant amount still requires disposal.
As a result, some shale gas wastewater is transported to treatment plants, many of which are not properly equipped to treat this type of wastewater. EPA will consider standards based on demonstrated, economically achievable technologies, for shale gas wastewater that must be met before going to a treatment facility.
Coalbed methane standards
Wastewater associated with coalbed methane extraction is not currently subject to national standards for being directly discharged into waterways and for pre-treatment standards. Its regulation is left to individual states.
For coalbed methane, EPA will be considering uniform national standards based on economically achievable technologies.
To ensure that these wastewaters receive proper treatment and can be properly handled by treatment plants, EPA will gather data, consult with stakeholders, including ongoing consultation with industry, and solicit public comment on a proposed rule for coalbed methane in 2013 and a proposed rule for shale gas in 2014.