Bat Houses Too Close to Home?

My dad built several bat houses and he loved to sit on the deck in the evenings and watch them swarm out by the thousands! Here's the problem. He built them only about 15-20 feet from the house and right over the deep well. They both suddenly fell seriously ill and my dad died. It may or may not have had anything to do with the bats, but no one wants to be around the property and especially drink the water. And the backyard stinks! How can we get rid of the bats or is there anyway to move the houses?

By Michelle