After three years of study, the EPA's investigation into a watershed in Wyoming has linked fracking to filth in an aquifer. People have been making such claims for a long time (cf. the movie Gasland) but now they have the government making similar claims, so maybe industry will work a bit harder on preventing this, if that's even possible. There are a few caveats: the aquifer/ fracking link was found in a place in which fracking happened at different depths than it usually does, for example. Still, it's official.
***Class members: the first link is posted on Blackboard under Readings. I moved it up so it's the first item you see there.