http://www.dispatch.com/live/content/local_news/stories/2011/05/17/cities-cant-treat-brine-from-new-gas-wells.html?sid=101

Heres an interesting article that focuses on the disposal of the wastewater; local communities were competing for the right to treat the wastewater at their treatment plants. The Ohio EPA shut that down, noting that long term effects are uncertain. (Treatment of the water continues, however, in the intermediary)
Deep water injection wells are still the top method for disposal