Arizona Attorney General Kris Mayes is calling for a statewide pause on new AI data center approvals, citing a federal plan to cut 30% of the state's Colorado River supply and a Ceres analysis projecting a 450% jump in water demand if all planned Phoenix-area projects proceed. She's also holding an October town hall over a 38-acre, one-million-square-foot Menlo Digital project in Ahwatukee already drawing local opposition.
Mayes wants the legislature and Gov. Katie Hobbs to halt approvals until the state has a monitoring plan, but Republican House leadership has instead pushed bills stripping counties of authority to regulate data centers and greenlighting unproven small modular nuclear reactors on-site.
An Arizona State University study cited in her announcement found nearby data centers can raise neighborhood temperatures by up to four degrees Fahrenheit, adding a literal heat argument to the water and power one.
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