That's for deep water drinking wells. Baton Rouge and south Louisiana are going through that now, with salt water penetrating a fault line that was once conside

That's for deep water drinking wells. Baton Rouge and south Louisiana are going through that now, with salt water penetrating a fault line that was once considered a barrier. The industrial corridor along the Mississippi consume an unbelievable amount of fresh water, so the same lesson might not apply to most areas. Pumping drainage and the ground water table is probably drawing salt water, but at shallow depths. Not deep enough for actual water wells.