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The U.S. Environmental Protection Agency (EPA) 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. Today’s announcement is in line with the priorities identified in the president’s Blueprint for a Secure Energy Future, and is consistent with the Secretary of Energy Advisory Board recommendations on steps to support the safe development of natural gas resources.

Natural gas drilling
Recent technology and operational improvements in extracting natural gas resources, particularly shale gas, have increased gas drilling activities across the country. Production from shale formations has grown from a negligible amount just a few years ago to almost 15 percent of total U.S. natural gas production and this share is expected to triple in the coming decades. The sharp rise in domestic production has improved U.S. energy security and created jobs, and as with any resource the administration is committed to ensuring that we continue to leverage these resources safely and responsibly, including understanding any potential impact on water resources.

Truck (4,000 gallon capacity) hauling used fracking water
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.

Information reviewed by EPA, including state supplied wastewater sampling data, have documented elevated levels of pollutants entering surface waters as a result of inadequate treatment at facilities. 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.

The schedule for coalbed methane is shorter because EPA has already gathered extensive data and information in this area, EPA will take the additional time to gather comparable data on shale gas. In particular, EPA will be looking at the potential for cost-effective steps for pretreatment of this wastewater based on practices and technologies that are already available and being deployed or tested by industry to reduce pollutants in these discharges.

This announcement is part of the effluent guidelines program, which sets national standards for industrial wastewater discharges based on best available technologies that are economically achievable. EPA is required to publish a biennial outline of all industrial wastewater discharge rulemakings underway. EPA has issued national technology-based regulations for 57 industries since 1972. These regulations have prevented the discharge of more than 1.2 billion pounds of toxic pollutants each year into US waters. (EPA)

More information

Municipal authorities enjoy the extra revenue created by accepting Marcellus Shale wastewater. If a 4,000 gallon tanker truck pays 5¢ per gallon for wastewater disposal, that amounts to $200.00 per truckload, which adds to a municipal authority's bottom line. (Marcellus Shale US)