The documentary, Gasland by Josh Fox, a 2011 Academy Award nominee for best documentary, gives an overview of fracking or hydraulic fracturing, the method used to extract gas from Marcellus Shale which results in radioactive containments, loosened from the ground, entering the water supply. If you click on this link, it will lead you to other information about the problem and suggest some actions. http://www.gaslandthemovie.com/whats-fracking/