Where was the bit in your linked resource where "scientists say that fracking is safe"? And in regard to drinking water contamination, you did see the notations that water resources can be contaminated by fracking activities, no?

The EPA report states that there are no widespread issues with water contamination, but does in fact document isolated cases where contamination has occurred. Just as with the earthquake bit, there is no absolute absolution of fracking when it comes to these unintended consequences.