The practice of hydraulic fracturing, known as ”fracking” is about to get a little more controversial. The U.S. Environmental Protection Agency for the first time has acknowledged that fracking is causing groundwater pollution. The practice of fracking involves pumping pressurized water, sand and chemicals underground to open fissures and improve the flow of natural gas and oil for extraction. The EPA responded to complaints from a Wyoming community near Cheyenne that complained about their drinking water. EPA testing of the local groundwater found compounds likely to be associated with chemicals from a nearby fracking operation. Health officials advised them not to drink their water after the EPA found hydrocarbons in their wells. The EPA announcement has major implications for a vast increase in gas drilling in the U.S. in recent years. Fracking has played a large role in opening up many natural gas reserves. The industry has long contended that fracking is safe, but environmentalists and some residents who live near drilling sites say it has poisoned groundwater. The finding could have a chilling effect in states trying to determine how to regulate the controversial process. The EPA’s findings were not unexpected. The unexpected was that they actually investigated the complaint and issued their findings.