If you have spent any time near the news this year, you have seen the headlines. Lake Mead and Lake Powell sitting near their lowest levels on record. Federal officials proposing steep new cuts to Colorado River deliveries. Water managers across the West bracing for a difficult stretch ahead. More than one client, especially those relocating from out of state, has asked me some version of the same question this summer: should I be worried about buying a home in Arizona right now?
I have worked in this market since 2004, and I have watched Arizona plan for a moment like this for longer than most people have been paying attention to water policy. The honest answer is also a reassuring one. The Colorado River is a real and important resource, but it is only one piece of a much larger, diversified water system here, and Arizona has some of the strictest water availability rules of any fast growing state in the country. Here is what is actually happening, and why it matters less to your home purchase than the headlines suggest.
What the Colorado River Headlines Actually Mean
The headlines are not fabricated. As of late August 2026, Lake Powell sat at an elevation of roughly 3,518 feet and Lake Mead at roughly 1,039 feet, both hovering near record lows after a winter of thin snowpack across the river’s headwaters. The U.S. Bureau of Reclamation has finalized an environmental review for how the river will be managed after 2026, and that framework opens the door to significant reductions for Lower Basin states, including Arizona, with shortages of up to 3 million acre-feet under consideration for 2027 and 2028.
That is genuinely worth understanding. What it is not, is a preview of Phoenix taps running dry. According to the City of Phoenix’s own July 2026 water supply figures, roughly 40 percent of the city’s drinking water comes from the Colorado River through the Central Arizona Project. Another 58 percent comes from the Salt and Verde rivers, a system Arizona manages entirely within its own borders, and about 2 percent comes from groundwater. A cut to one input, even a serious one, is not the same as a cut to the whole system, and Phoenix has spent decades making sure of that.
Roughly 40 percent of Phoenix’s water comes from the Colorado River. The other 60 percent flows from the Salt and Verde river system and local groundwater, resources managed entirely within Arizona.
Decades of Water Banked and Built
This is the part of the story that rarely makes the evening news, and it is the part that matters most if you are deciding whether to put down roots here. Salt River Project manages a 13,000 square mile watershed and a reservoir system with roughly 2.3 million acre-feet of storage capacity, delivering about 800,000 acre-feet of water a year to 2.5 million Valley residents, entirely independent of the Colorado River.
Phoenix has also been quietly banking water underground for decades, through programs like the Arizona Water Banking Authority, and currently holds an estimated 700,000 acre-feet in underground storage across the Phoenix and Tucson areas, held in reserve for years like this one. The city also operates roughly 20 groundwater recovery wells, with 10 more coming online in the next several years, and completed a 300 million dollar Drought Pipeline Project that moves Salt and Verde river water into north Phoenix communities that historically leaned more heavily on Colorado River supply.
Then there is the Central Arizona Groundwater Replenishment District, known as CAGRD, which has operated since the mid 1990s to replenish groundwater pumped by member communities across the Phoenix, Pinal, and Tucson Active Management Areas, funded through market based water acquisitions rather than tax dollars. Pure Water Phoenix, the city’s advanced purification program, is expected to add more than 50,000 acre-feet of renewable water annually within a decade, with its first facility already under construction. At the state level, the Water Infrastructure Finance Authority of Arizona has moved four large scale desalination and water importation proposals into active study, including a Gulf of California desalination and binational conveyance concept.
Phoenix has roughly 700,000 acre-feet of water stored underground, and Salt River Project’s reservoirs hold another 2.3 million acre-feet of capacity. This is water banked for exactly this kind of year.
Why Arizona’s Development Rules Are Tougher Than Almost Anywhere Else
Here is where Arizona genuinely stands apart from most of the country. Under the state’s Assured Water Supply program, any new subdivision within an Active Management Area, which includes the entire Phoenix metro area, must prove it has access to a 100 year water supply before a single lot can be recorded or sold. That is not a marketing claim. It is a legal requirement, verified and enforced by the Arizona Department of Water Resources, and it applies to the mid-century ranch remodels in Arcadia just as much as it applies to a brand new custom build in North Scottsdale.
In 2026 alone, ADWR updated its Phoenix Active Management Area groundwater model with current pumping and recharge data, and the state’s Agriculture to Urban program is now allowing agricultural water rights holders to convert pumping rights into Groundwater Savings Credits that count directly toward that 100 year requirement, adding verified supply as farmland transitions to housing. Compare that to many other fast growing states, where developers can often break ground with far less scrutiny of what happens to the water supply in year fifty, let alone year one hundred. Arizona asks the harder question up front, before you ever tour a home.
In most of the country, a developer can break ground without proving there is enough water to last a lifetime. In Arizona’s Active Management Areas, a proven 100 year water supply comes first.
What This Means for Buyers and Sellers
If you are house hunting in Arcadia, Paradise Valley, the Biltmore, Scottsdale, North Scottsdale, or the Central Corridor of Phoenix, the water headlines are worth understanding and not worth losing sleep over. Every established neighborhood in this market sits inside a municipal system that has already secured, banked, and diversified its supply well beyond the Colorado River alone. That groundwork was laid years before this summer’s headlines, not in response to them.
I will not tell you costs are frozen. Phoenix has said plainly that further Colorado River reductions could bring drought surcharges and expanded conservation requirements, and water rates across the Valley have trended upward for years, the way most utility costs have. That is a real, modest planning consideration, and I talk it through with every client. It is a very different conversation from wondering whether the tap will work.
For sellers, there is no need to get defensive if a buyer raises water headlines during a showing. The straight, well-informed answer, backed by ADWR’s 100 year rule and decades of Arizona infrastructure investment, tends to reassure discerning buyers faster than avoiding the topic ever would.
Frequently Asked Questions About Arizona’s Water Supply
Is Phoenix going to run out of water?
No. Phoenix draws from a diversified portfolio, Colorado River water through the Central Arizona Project, the Salt and Verde river system, groundwater, and reclaimed water, and the city has roughly 700,000 acre-feet banked underground to manage shortage years. The city remains in Stage 1 of its drought management plan, focused on conservation, not restriction, as of late 2026.
How much of Phoenix’s water actually comes from the Colorado River?
About 40 percent, according to the City of Phoenix’s July 2026 figures. The remaining 60 percent comes primarily from the Salt and Verde rivers, managed by Salt River Project, along with local groundwater.
What is Arizona’s Assured Water Supply program?
It is a state requirement that any new subdivision in an Active Management Area, including the entire Phoenix metro area, prove access to a 100 year water supply before it can be recorded or sold, verified and enforced by the Arizona Department of Water Resources.
What is CAGRD and why does it matter to homebuyers?
The Central Arizona Groundwater Replenishment District replenishes groundwater pumped by member water providers across the Phoenix, Pinal, and Tucson Active Management Areas, helping developments meet the state’s 100 year supply requirement through a diverse, market based portfolio of water acquisitions.
Will Colorado River cuts affect my water bill in Arizona?
Possibly, over time. Phoenix has indicated that further federal reductions could lead to expanded conservation programs and potential drought surcharges, but it has not indicated any risk to basic water service, given its other supply sources.
Should I be concerned about buying a luxury home in Scottsdale or Paradise Valley because of water supply?
No more than in any other established Western market, and arguably less. These communities sit within Arizona’s Active Management Areas, where the 100 year Assured Water Supply requirement already applies, and both benefit from Salt River Project’s independent reservoir system in addition to Colorado River supply.
I have spent more than two decades watching this market grow, and I have watched Arizona’s water planners work just as hard behind the scenes to keep pace with it. The headlines about the Colorado River are real, and so is the work Arizona has done for decades to make sure they do not define your decision to live here. If you are weighing a move to Arcadia, Paradise Valley, Scottsdale, or anywhere in between and want a straight answer about the market, reach out. I would be glad to talk it through with you.
