Arizona Welcomed TSMC and Is Fighting Data Centers: Why Water Is the Line

Arizona is one of the clearest tests of whether the AI buildout can survive local politics. The Verge's new feature reports that the same desert region that opened its arms to TSMC, a chip complex drawing nearly 5 million gallons of Phoenix municipal water every day, is now seeing a grassroots and bipartisan coalition rise up against hyperscale data centers from Phoenix to Tucson. The difference, residents say, is not only the water. It is who benefits, who gets told, and how much of a shrinking Colorado River is left to share.

This post walks through what the reporting says, what is disputed, and what it means if you build or depend on AI infrastructure. It sits alongside our earlier coverage of the real environmental impact of data centers and the data center backlash heading into the midterms.

TL;DR: the questions people ask

Why TSMC got a welcome and data centers did not

The Verge's reporting starts with TSMC. When Phoenix courted the company, it was recovering from the Great Recession, and the pitch worked. TSMC's first announced Arizona spend was $12 billion by 2029. That has since grown to a projected $265 billion, which the company touts as the largest foreign direct investment in US history. The second fab is finished, a third is under construction, and the complex already employs more than 3,500 people.

Christine Mackay, who led Phoenix's economic development office and helped land TSMC, says the state now has a sixth "C" next to cattle, copper, cotton, citrus and climate: "Chips." The article points out that TSMC's Arizona operation continues to run without significant opposition even as people across the country sour on AI.

The data center story reads differently. Arizona already hosts 172 data centers, per The Verge, and the first wave drew little attention. Mackay recalls that "the first 10 data centers I did look like pretty little office buildings." The newer proposals are large, built on rural farm or desert land, and demand more water, power and land. That is the same pattern we described in Nvidia and TSMC's US supply chain buildout: the chip side of AI comes with a factory economy, while the compute side often comes with a very large building and a small payroll.

What is the water math?

The numbers matter here because both sides use them selectively.

• TSMC Arizona: nearly 5 million gallons a day (The Verge).
• A hyperscale benchmark: about 1.5 million gallons a day at Google's The Dalles, Oregon facility, one-third of TSMC's figure (The Verge).
• Developer promise: Beale said Project Blue would eventually run on reclaimed water, build an 18-mile pipe extension and an aquifer recharge facility, and be "water-positive" (The Verge). Until the pipeline exists, it would use potable water.
• On-site wells: Al Jazeera reports Beale began digging wells after reportedly receiving state permits, likely for about 31,000 gallons a year, enough for toilets and kitchens.
• Agriculture context: Eric Kuhn, a retired general manager of the Colorado River Water Conservation District, told Al Jazeera that data center use is low compared with farm use, especially alfalfa and hay.
• The regulatory gap: Sharon Megdal of the University of Arizona's Water Resources Research Center told Al Jazeera data centers are not under the same rules to replenish water as other industries, so "it adds a straw to the aquifer."

In other words, a single data center may use less water than a fab or a farm. The argument is about the stacking: a state about to lose a large slice of its river supply, and a wave of projects asking for more.

Water footprint of AI infrastructure shown as a droplet above a cooling basin

The Colorado River backdrop

The Verge says Arizona will soon lose access to nearly 30 percent of the water it receives from the Colorado River. Al Jazeera, in a June report, says flows have dropped 20 percent since 2000 compared with the 20th century and that the state could face as much as 77 percent cuts. Those are different scenarios, and the larger one is a possible outcome rather than a confirmed allocation. Governor Katie Hobbs has told the Bureau of Reclamation that semiconductors, space and data centers are essential industries that need a higher share, according to Al Jazeera.

Tucson's heat adds pressure. Melanie Cooley of the Watershed Management Group told the Tucson crowd, as The Verge reports, that average temperatures are 11 degrees Fahrenheit higher than a century ago, about six from global warming and five from local ecosystem changes. Kate Gordon of California Forward told Al Jazeera that heat makes servers less efficient and drives higher water and cooling needs, and that "climate does not figure" enough in business plans.

Project Blue: how a data center became a civic fight

The Project Blue timeline is the heart of The Verge's piece:

1. Spring 2025: details trickle out. The land is county-owned, the developer is under an NDA, and the project promises 3,000 temporary construction jobs, 200 permanent positions and $152 million in tax revenue over ten years.
2. June 2025: Pima County's administrator submits a 44-page memo to the Board of Supervisors. The words "data center" first appear on page four.
3. The board votes 3-2 to rezone the 290 acres and sell them to Beale for about $20 million. Hours later, Tucson Electric Power announces a rate-hike request averaging 14 percent. The utility says the two are unrelated.
4. July 2025: about 200 people attend a first public meeting. A follow-up at the Tucson Convention Center draws over a thousand and the boos start before introductions end.
5. August 2025: Tucson City Council votes unanimously against the annexation and adopts new rules for large water users.
6. Weeks later, local reporters confirm Beale is proceeding anyway. Beale declined to tell The Verge why annexation was no longer needed.
7. Over time the plan shifts to closed-loop air cooling. Opponents argue that burns more electricity.
8. End of April 2026: construction starts. Subcontractors haul in water for dust control, and county authorities cite Beale, according to Al Jazeera.

Reports linked Amazon Web Services to the project through county documents and records obtained by Arizona Luminaria, and The Verge says AWS was reportedly the end client. Local station KGUN later reported that AWS is no longer attached to Project Blue. The secrecy angle is the same one we covered when Google said it would stop using NDAs with local officials.

Residents gather around a blank protest sign near houses, a data center opposition scene in Arizona

Marana, La Osa and the wider map

Project Blue is not the only site. Al Jazeera describes a second Beale proposal in Marana, a farming town northwest of Tucson, on roughly 600 acres, about twice the size of Project Blue and a $5 billion project. Residents asked for a referendum on the rezoning and did not get one; the council approved it. One resident, Jackie McGuire, then decided to run for city council on a transparency platform.

In neighboring Pinal County, the La Osa project by the Vermaland real estate group was planned at 3,300 acres with 59 data centers and two of its own natural gas facilities. At a May 27 board meeting a lawyer said it had been scaled to 11 data centers, per Al Jazeera. In Mesa, The Verge notes the EdgeCore PH03 center, the state's largest, sits beside a residential neighborhood.

A comparable pattern is playing out elsewhere: see our posts on protests against Amazon's data center in Thane, India over water and power and the xAI Southaven homeowner buyouts.

What is claimed and what is verified

One caveat on sourcing: this post is built from The Verge feature plus Al Jazeera's June reporting. Where details differ, we attribute them to the outlet.

What this means if you build or pay for AI

Few readers run a data center, but the constraints show up in prices and availability.

• Siting risk is now a cost line. Projects that win zoning but lose public trust face delays, litigation and rule changes, as Tucson's new large-water-user rules show. Cloud capacity planned for the Southwest is exposed to that.
• Cooling choices trade water for power. Closed-loop air cooling shifts the burden to the grid. That links back to electricity and water together, not either one alone.
• Chips and compute are politically different. A fab and a data center may use comparable water, but the fab arrives with thousands of jobs. If you follow TSMC's record quarter and AI demand or CoWoS pricing, remember the supply chain's physical footprint is also under pressure.
• Big campuses elsewhere face the same question. Meta's Prometheus supercluster and similar builds rely on local water, power and goodwill.
• Elections matter. Water and data centers have featured in Arizona's primary races, according to Al Jazeera, and Hobbs is up for re-election in November.

What to watch next

• Whether Beale's pipeline and aquifer recharge promises are built and audited.
• How Arizona's Colorado River allocation is settled once current operating rules expire at the end of 2026.
• Whether Tucson's new large-water-user rules are copied by other cities.
• Whether more developers disclose water and power use up front instead of through NDAs.
• Whether other states follow with moratoriums or reporting rules.

Related reading

• The real environmental impact of data centers: water and electricity
• Data center backlash in the midterms
• TSMC Q3 2026 record profit and AI demand
• Taiwan-Texas industrial park and Nvidia's supply chain
• Google stops data center NDAs with local officials
• Amazon Thane data center protests
• xAI Southaven homeowner buyouts

Figures and project status are as reported by The Verge (October 29, 2026) and Al Jazeera (June 27, 2026) at publication and may change as construction and water negotiations continue.