From talking to one of the geologists at work on this, the majority of the oil and gas are located below most of the used water tables. This would mean no contamination to drinking water. It's also funny that everyone wants to quit being dependant on foreign oil, use electric/natural gas cars but they never want people to acquire the resources to do this. We can't have both and the companies have to jump through hoops with the department of natural resources, epa, army core and others to protect the environment and the public. I would have to see if the gas companies are like most mineral companies and have to post some sort of bonding against ruining someone's water. I'm also sure they would have to do at a minimum annual water monitoring from people in the area of the well. This is stuff I would have to look into and maybe bad might know the answer.