I would strongly suggest a little research into the chemicals used in fracking. They are common everyday compounds, not exotic. Most of these chemicals are used every day at every water treatment plant in this country for making safe drinking water. Acids, bases, biocides, inhibitors, and binders.
There are some others used for friction reduction that are not used in treating water for drinking but are common in the intake water of every water treatment plant, Ethylene glycol, isopropanol. I'm sure you recognize these are anti freeze. There is also some petroleum traces amounts, again common to most any water intake in the country today.
Fracking wells has been going on since 1940's. It is a highly regulated industry. We have all of the resources for energy independence many times over for many many decades right here in the US, We don't need the middle east, we just need to continue developing what we have. The good part is that it looks like we will even through the objections of the uninformed and Obama.