I tried digging for water when I was a kid.  Water coming out of the tap had a nasty taste.  Boiling it helped.  I gathered all the objects I could find and started digging.  It was hard work as the dirt was hard and rocky.  About a foot deep I hit clay and couldn’t go any deeper with my screwdrivers and garden spade.  Thus ended my quest to find cold refreshing well water. In the time since I have tried many waters.