New study says water left in ground after fracking is not a serious risk

New research on hydraulic fracturing has found that injected water that remains underground after oil and gas drilling operations is sequestered in the rock formation and does not pose a serious risk to water supplies. reports the findings are in a paper published in the current issue of the Journal of Unconventional Oil and Gas Resources by researchers at Penn State and Cornell universities and Shell International Exploration and Production Inc. GantDaily says the research was conducted in response to uncertainty over the risk to groundwater posed by water left in place – called residual treatment water – after fracking operations.