Another thing has skyrocketed: the amount of water used in each well. In some places, says study author Avner Vengosh, “this net increase per well caused overall increase” in water usage for fracking in regions where it is practiced. The increase was as much as a whopping 770 percent in the Permian region of West Texas. There, for gas-producing wells, water use went from from about 350 gallons per foot of well in 2011 to 2335 gallons per foot of well in 2016. But in others, such as the Marcellus region of Pennsylvania and West Virginia, the amount of water used overall for fracking stayed about the same even though wells got bigger, because there were fewer of them.