New study finds that hydraulic fracturing can pollute well water with methane

A study published last week in the Proceedings of the National Academy of Sciences found that "drinking-water wells in northeastern Pennsylvania within a kilometer of high-volume hydraulic fracturing...showed methane concentrations six time as great, on average, as wells farther away," The Columbus Dispatch and Chicago Tribune report. The study seems to suggest that faulty metal casings and faulty cement jobs are responsible for the pollution. In an effort to assuage concern, the Ohio Department of Natural Resources (ODNR) pointed to a 2012 law imposing tougher standards "for well casing and construction," but critics say ODNR has yet to advance the rules "needed to enforce tougher standards" as the law reaches its first anniversary, the article said. 

Pennsylvania