While this is true, we're not 100% out of the woods. My brother is an architect in the region and mentioned to me that our exurbs and suburbs are notorious for fudging their water sustainability numbers vs actual use.
Since 1980 total water use has declined in the state by about 25% while population has tripled (300% growth). New construction is required to use grey water where suitable and it's waster water makes it back as treated or depending on geography is used by Palo Verde nuclear station. This is a non issue.
Tripling would be 200% growth, quadrupling would be 300% growth. Therefore I wasn't sure which one you meant, and I checked: according to [1] there was roughly a tripling from 1.5M to 4.5M between 1980 and 2020.