Good read on fracking's use of water supplies

http://thinkprogress.org/climate/2013/06/15/2163531/fracking-is-already-straining-us-water-supplies/

Choice quoate: "That’s about equal, EPA says, to the water use in 40 to 80 cities with populations of 50,000 people, or one to two cities with a population of 2.5 million each."