It may vary from place to place, but in Phoenix it's a minimum of 25 ft.
If your zoning board has no restrictions as to how far a pool needs to be from a structure then my advice would be place the pool far enough away from anything that a person might jump off of....
14.47 kilometres (8.99 miles)
It's about 230 miles from Tucson to Sedona. Should take about 4 hours driving, give or take for traffic and stops, of course.
219.88 kilometres (136.63 miles)
It is about 118 miles.