47 data centers and projects on our map in Arizona, including 6 projects we track in detail. Each one links to its source. Below: where they are by county, the projects in the news, and the latest reporting from both sides.
See Arizona on the map. Existing facilities come from OpenStreetMap, a community-maintained public map that is incomplete; proposed, under construction and blocked projects are tracked one by one from news, filings and official records.
Blocked, paused or withdrawn Rezoning denied 4 to 1 by the county board of supervisors, August 2026
Eloy, Pinal County
A proposed data center and generation project near Eloy in central Arizona. Local groups and labor unions filled the hearing room, and supervisors voted the rezoning down, part of a series of Arizona decisions driven by water and electricity concerns.
Issues raised: water, power, opposition, zoning
Blocked, paused or withdrawn 120 day moratorium adopted 3 to 2 on Sept. 22, 2026
Tucson, Pima County
announced 2026-09-22
Pima County paused new data center applications for 120 days while staff drafts zoning rules aimed at addressing drought, air pollution and noise. Staff aims to bring a permanent policy back by December 10.
Issues raised: water, air-pollution, noise, zoning, opposition
Blocked, paused or withdrawn Annexation rejected 7 to 0 by Tucson City Council, August 2025
Tucson, Pima County · Operator: Beale Infrastructure
A proposed data center campus originally linked to Amazon Web Services on land the city was asked to annex and serve with water. The council voted against it after large public meetings focused on desert water use, electricity demand and the secrecy of the negotiations, and the developer later looked at unincorporated Pima County.
Issues raised: water, power, opposition, zoning
Proposed Planning and Zoning Commission approved conditional use permit 6 to 1 on 2026-10-01
Casa Grande, Pinal
announced 2026-10-01
The Casa Grande Planning and Zoning Commission approved a conditional use permit on October 1, 2026, for the 954 acre campus, which plans to use on site natural gas fuel cells and operate off grid. The commission approval followed a hearing in which 17 written comments opposed the project and three supported it, with concerns focused on water use during drought.
Issues raised: water, power, jobs, zoning, air-pollution
Mesa, Maricopa County · Operator: Apple
$2 billion
Apple converted a shuttered sapphire glass plant in Mesa into a global data command center, a roughly 2 billion dollar project that employs about 150 full time staff. It anchors Mesa's Elliot Technology Corridor, which now holds several large data centers and is a focal point for Arizona debates over water and electricity in a drought stressed region.
Issues raised: water, power, jobs, tax-incentives
Goodyear, Maricopa County · Operator: Microsoft
Microsoft's Goodyear campus has been operating since the early 2020s and became a test case for data center water use in metro Phoenix. Microsoft agreed to air cooled designs for new capacity and in March 2026 committed 36 million dollars toward a 90 million dollar expansion of the city's wastewater treatment plant to increase reclaimed water supply.
Issues raised: water, power, tax-incentives, jobs
Attorney General Kris Mayes will host a public town hall on data centers in Mesa, Arizona on October 14, part of her office's continuing push for a statewide pause on new approvals while a plan is developed to manage energy and water impacts. The event follows her office's focus on Menlo Digital's proposed Ahwatukee project and resident objections there.
Check it: A town hall is an outreach event and does not by itself change state policy, which still rests with the governor and legislature.
Candidates for two open seats on the Arizona Corporation Commission split on whether the regulator should launch an independent review of whether data centers are paying their own costs, with the issue sharpened by the attorney general's call for an investigation. APS is also seeking a $608.7 million rate increase.
Check it: Candidate positions in an election are not commission decisions; check the ACC's docket for any formal investigation order.
Attorney General Kris Mayes asked state regulators to publicly investigate a consumer advocate's analysis contending that between 2023 and 2025 roughly $587 million in costs tied to large energy users, principally data centers, may have been allocated through APS's Power Supply Adjuster to other customers. APS called the analysis misleading and said residential and small business customers are not paying for data center power usage.
Check it: The $587 million is a consumer advocate's calculation that APS disputes; the number is contested, and no commission finding has been made.
The Casa Grande Planning and Zoning Commission voted 6 to 1 on October 1 to approve a conditional use permit for the Grande Valley Industrial Data Center Campus, a 954 acre site planned to use on site natural gas fuel cells rather than a grid connection. The city received 17 emails in opposition and three in support, with speakers at the hearing raising water, drought and job quality concerns; developer estimates include 1,200 construction jobs and 445 permanent jobs.
Check it: Job and tax revenue figures come from the developer; the water cap and self generation claims should be checked against the final permit language.
The Casa Grande Planning and Zoning Commission voted 6 to 1 to approve a conditional use permit for a 954 acre data center campus with on site natural gas generation and battery storage near Montgomery Road, under the city's new 2025 data center ordinance. The developer has an allocation of about 300 acre feet or 97 million gallons of water per year, and 9 of 10 public speakers opposed the project amid Colorado River cuts and recent Lucid Motors layoffs. No City Council vote is required.
Check it: Check the actual water allocation and whether it is groundwater or Central Arizona Project water, and whether on site gas generation will be subject to air permitting separate from the CUP.
The Grande Valley conditional use permit was the first full test of Casa Grande Ordinance 3479, which the city adopted in 2025 to replace by right data center approvals in I 2 industrial zones with public hearings before the Planning and Zoning Commission. Two landowners separately sued the city over the new rules, claiming $140 million in lost property values; the city previously waived requirements for one of them to avoid a settlement payout.
Check it: Check whether other Arizona cities adopt or copy Ordinance 3479, and whether the pending $140 million property rights suit against Casa Grande proceeds now that the Grande Valley permit was granted.
The Pima County Board of Supervisors voted 3 to 2 on September 22 to pause new data center permits for 120 days while staff drafts zoning rules the board hopes to adopt by December 10. The resolution cites public health, air pollution, drought and noise concerns. Two existing projects, Project Blue and the proposed Project Gravel in Sahuarita, are already in the pipeline and their treatment under the moratorium is disputed.
Check it: Confirm whether Project Gravel is covered by the moratorium or grandfathered because of prior industrial zoning.
Attorney General Mayes asked Governor Hobbs and the legislature to enact a one-year moratorium on approvals of hyperscale AI data centers, citing rising electric bills and a roughly 30 percent cut to Arizona's Colorado River allocation. Mayes also announced a town hall on the proposed Ahwatukee data center. State lawmakers already paused Arizona's data center sales tax exemption for three years in the 2026 session.
Check it: The AG has no unilateral authority to impose a moratorium; enactment would require the governor or legislature.
For the arguments behind these fights, see the case for data centers, the case against, and the questions people ask, each answered from both sides.
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