Covers
Motorized safety covers
Mesa lists a pool cover as one way to meet the barrier requirement.
This is an independent referral guide. It connects homeowners with independent providers and may receive compensation. It is not a licensed contractor and it does not do the work.
The rules
The brochure says the pool shall have a motorized safety cover requiring a key switch meeting ASTM emergency standard F1346, with no manual operation other than the key switch, located at least 54 inches above the floor.
Above ground spas
Above ground spas and hot tubs may be equipped with a hard safety cover that can be latched or locked.
Sources
Public pages, linked so you can read the source yourself. Rules change, so confirm the current version with the agency before you rely on it.
Talk through your Mesa project
Share the part of Mesa you live in, the yard size, and anything unusual about the lot, like a slope or a utility easement.