Reader Don sends some more information on the hydrofracking wastewater disposal issue. This ProPublica feature details the difficulties drillers have had in disposing of wastewater via municipal treatment plants. Most town wastewater plants run near capacity, and those that don't aren't thrilled about running chemical brine through plants made for regular sewage.
Don also sends this Wall Street Journal article, which details how a Chesapeake Energy wastewater storage well may have caused a number of small earthquakes in the Dallas, Texas area. Chesapeake has applied to use a depleted gas well in Steuben County as a wastewater disposal well. The application [giant pdf] includes a map that shows that the proposed well site is very close to Keuka Lake. Don notes that the site is also on the Keuka wine trail.
All this shows, as if it weren't obvious already, that there are significant risks associated with hydrofracking and associated waste.