I have a cabin on some land near Joshua Tree. There's water in the ground (300-400ft down) but I haven't bothered to put in a well, instead just hauling what little I need from the nearby town's bulk water dispenser.
Unlike AZ apparently, CA doesn't allow any new construction without a secure and sufficient water supply. Installing new cisterns for receiving hauled water is no longer permitted, but existing cisterns are grandfathered in. It seems like they never make any exceptions. A nearby fire station permanently closed when their well water was found to be too toxic and they weren't permitted to install a cistern for hauled water.
It seems like AZ could solve this issue state-wide by adopting a similar permitting requirement, instead of having these parcels-of-5 loopholes enabling entire subdivisions to be built without water.
The problems my area has been dealing with are illegal agriculture (large marijuana grows) depleting the ground water, and there's always some hare-brained commercial plan trying to plow through the red-tape and resell the cheap but finite groundwater in one form or another.