National Academy of Sciences (NAS) members are grappling with a host of questions about hydraulic fracturing's impact on wastewater including barriers to reuse of wastewater for fracking and potential contaminants in wastewater from fracking, while saying concerns over disclosure of chemicals used in fracking may be easing. Those questions include how to distinguish between wastewater from conventional oil and gas drilling and unconventional wastewater associated with fracking of shale formations, addressing the high levels of radionuclides present in wastewater from certain types of shale formations, and removing barriers to beneficial reuse of wastewater for fracking, road application and other uses.
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