AZ and the Southwest Faces an Existential Water Crisis

[Igel]

4. Depends.

Most of the new houses will come from the usual dam system.

A lot of golf courses use recycled--take sewage and quickly clean it up--not potable, but not black water any more--and use that.

In most US jurisdictions people don't like recycled sewage coming out of their tap.

Most houses I've seen in the Phx area have brown front yards and small green backyards. Mostly because you don't want small kids running on the gravel. My parents house had a small green patch maybe 10 x 8, the rest of the back, even, was gravel. Last I heard, my brother was tired of watering his backyard and was thinking of putting down stone. My ex-MIL has no lawn, but does have a vegetable garden with drip lines (and a well).