There are wells just depends where you are. Take Nevada. Las Vegas get pretty much all their drinking water from Lake Mead. 60 miles to the west in Pahrump it is 100% ground water. Most all the farm land in the California Center Valley is feed with ground water. Been sucking the aquifer dry for decades. Guess they are down to 2500' there now. Now the ground is settling 10-20 feet.
They are wanting to drill more aqua ducts to take even more water from the west side to the east side to feed Denver and the Front Range. Here in the Colorado River District we are fighting with both Denver and all the states down stream for water.