Opponents of hydraulic fracturing for natural gas, also known as “fracking,” have long claimed that it contaminants drinking water. Unfortunately for them, they have been unable to find such contamination – and now their job has just gotten even more difficult with a recent study in Arkansas by the U.S. Geological Service. The USGS examined some 127 wells in the Fayetteville gas range for heighted methane and chloride concentrations, a region in which activists were certain they would find contamination. What the USGS found instead, however, was perfectly safe drinking water. To date, there are no confirmed cases of groundwater contamination from hydraulic fracturing anywhere in the United States.