You can’t “patch” a well that’s too shallow. It’s not a pair of jeans. The issue is that the aquifer—the underground water layer—has shifted or dried up. You have to drill through earth’s crust to chase it.
Fun fact: the deepest well ever drilled is the Kola Superdeep Borehole in Russia—7.5 miles deep. That cost $25 billion in today’s money. Your backyard well won’t cost that much, but it’s still a grounding experience.
The average American household uses about 300 gallons of water per day. So if you’re paying $10,000 to go deeper, that’s roughly 33 cents per gallon for the next 10 years—cheaper than bottled water, but still makes you flinch.