Mesa has been around longer than almost any pool city in the state, and that depth is the whole story.
Founded in 1878 and incorporated in 1883, Mesa grew into Arizona's third-largest city — and unlike the newer suburbs, it lived through the full evolution of how pools are built. The 1940s brought gunite, the sprayed-concrete method that let builders shape a pool freely instead of pouring it into forms, and the postwar boom turned that into a mid-century wave of kidney-shaped backyards. Through the 1950s and '60s the fundamentals we still rely on took hold: PVC plumbing in place of galvanized iron and copper, standardized skimmers and main drains, pools engineered to last. Then came the Arizona turning points — aggregate finishes like Pebble Tec out of neighboring Scottsdale in 1987–88, and the state's pool barrier law in mid-1991.
Mesa lived through every one of those chapters, and its pools are spread across all of them. Central and west Mesa hold a deep bench of pools from the mid-century and 1970s–80s eras — many predating both the aggregate finishes and the barrier law, which means original plaster and backyards designed before the fence rules, where the house wall served as the enclosure. Far-east Mesa, by contrast, filled in through the 1990s and 2000s with modern, barrier-standard, aggregate-finished pools. The city grew fast enough — up roughly 24.5% between 1990 and 1998 alone — that these eras sit close together on the map.
That's why in Mesa we always start with age. A pool near the original townsite and a pool out past Power Road can be a half-century apart in design, even if they're only a short drive apart. Mesa's water carries one of the widest hardness ranges in the Valley — published figures run from about 12 to 22 grains per gallon, and some sources cite an even wider spread by neighborhood and season — so a quick water test on the actual property is worth more than any citywide number when we plan for scale.