Most fracking fluid is water, soap, and sand or glass beads. That about it. Sometimes a little acid to etch the rock. Couple that with the fact that the zones you are working on are mile or more below the water table means that the odds of that fluid coming into contact with the drinking water is almost zero.
You stop that logic and reason bullshit. Stop it right now.
Think of how stupid the average person is, and realize half of them are stupider than that - George Carlin