Yes, of course there can be contamination, but it's not guaranteed. First, you are drilling through the ground water. Second, you broke through those layers to

Yes, of course there can be contamination, but it's not guaranteed. First, you are drilling through the ground water. Second, you broke through those layers to go do. Hopefully the tech and practices in the field prevent this. But we know it does happen because some people have had their water ruined. Plus, we know it has strong potential because of state legislatures being encouraged to make laws protecting the drillers (not the home owners).