Now you are starting to post something that while overly general is at least useful, it sure beats simply telling people that a desert state can have areas where water is a problem.
Living outside of a base that would maintain water supplies is useful.
Also useful are wells like my family’s New Mexico well which is 1200 feet deep and has already been verified as capable of supplying water to an entire community by the water district that wanted it for that purpose.
You post the exception not the rule. And you have not address the problem of providing long term power to pump the water to the surface.
I have said it more than once in a major long term shtf situation the Rio Grand Bosky would soon become a killing field for ‘gangs’ of predators. What few natural lakes would quickly come under someone’s control.
At one time ‘wars’ were repeatedly been fought in New Mexico over water and during a long term shtf they would surely and quickly occur again.