Can you prove with any degree of certainty that there is no danger from fracking process with respect to the water supply being contaminated?

As you may know, hydraulic fracturing has never contaminated groundwater, as confirmed by U.S. Energy Sec. Moniz and countless other officials and experts. Recently, in fact, “A landmark federal study on hydraulic fracturing, or fracking, shows no evidence that chemicals from the natural gas drilling process moved up to contaminate drinking water aquifers at a western Pennsylvania drilling site,” as the Associated Press reports. Straightforward science continues to demonstrate this important fact.