Is Arizona Running Out of Water? What Phoenix Home Buyers Actually Need to Know (2026)
Short answer…. no. Arizona is not running out of water. What's actually happening is more specific than that headline, and it matters a lot depending on where and what you're buying.
Here's the real version. The Colorado River is being cut back hard. Water bills across the Valley are going up. And there's a real fight happening over where new subdivisions can be built on undeveloped desert land. But if you're buying an existing home, or new construction, inside an established city like Phoenix, Scottsdale, or here in Arcadia and 85008…. this is not the crisis the national headlines make it sound like. Let me walk through why.
What just happened with the Colorado River?
The federal government finalized a new Colorado River plan this year that cuts Arizona's share by 27% annually through 2028, with the possibility of cuts up to 40% after that. The whole thing gets revisited every two years through 2036, so this isn't a one time hit, it's an ongoing negotiation.
Arizona is taking the biggest cut of any state on the river. That's the real, hard part of this story, and I'm not going to soften it.
Does Phoenix actually depend on the Colorado River for its water?
Less than you'd think. Colorado River water makes up roughly 40% of Phoenix's supply. The Salt and Verde River system, which is separate and comes from mountain snowmelt inside Arizona, covers about 58%. The rest comes from groundwater and a growing amount of recycled water.
That mix is exactly why Phoenix's own water resources manager put it this way…. "There will never be a moment where you go into your house, you turn on your faucet and no water comes out the other side." Smaller towns that lean almost entirely on the Colorado River, like Cave Creek, have a harder road here. Phoenix isn't one of them.
So what's the actual cost?
Your water bill going up. That's the honest tradeoff. Gilbert's rates have roughly doubled since 2024 to fund new infrastructure, including a $359 million plant that will turn treated wastewater into drinking water by 2029, and Phoenix is funding similar projects. Someone put it to me simply and I think it's the most accurate line in this whole story…. "Arizona's not running out of water, but we are running out of cheap water."
Does this affect buying a home in Phoenix, Scottsdale, or Arcadia?
Mostly not, and this is the part that actually matters for you.
The restriction you may have seen in the news, the one pausing new subdivisions over groundwater concerns, applies to new development on undeveloped desert land that depends on pumped groundwater instead of a city water utility. Established cities, Phoenix and Scottsdale included, already hold a Designated Assured Water Supply that covers their entire service area…. existing homes, resale, and infill new construction all included. That's Arcadia. That's 85008. If you're buying inside the city water service area, you're not the subdivision this fight is about.
There's also a state court ruling from earlier this year that pushed back on part of how the groundwater rule was being applied, and that fight is still working its way through. Worth watching if you're specifically eyeing a large new master planned community out on the edge of the metro. Not something you need to lose sleep over if you're buying a house in an established neighborhood.
What should you actually watch for as a buyer?
Two things, honestly. If you're looking at a brand new community built on previously undeveloped land, ask where its water comes from and whether it has its own Designated or Certificated Assured Water Supply, not just a promise. If you're buying resale or infill inside Phoenix, Scottsdale, or another established city, this question is already answered for you, it has been for decades.
And expect your water bill to keep climbing over the next several years no matter where you buy. That part isn't going away.
Arizona has a real water story happening right now. It's just not the one that makes for the best headline. Cheers,
Molly