Arizona’s Largest Utility Seeks Significant Rate Increase Amid Rising Costs
Arizona Public Service Co. (APS), the state’s largest electricity provider, is pursuing an almost 14% rate increase to address escalating operational costs. This proposal has faced opposition from consumer advocates and the state’s Attorney General, Kris Mayes.
APS reports that the increase is essential to manage the financial demands of supplying energy to around 1.4 million homes across Arizona. The utility previously implemented an 8% rate hike two years ago due to similar cost pressures.
Ann Porter, a spokesperson for APS, highlighted the dramatic rise in infrastructure expenses. “Looking back at 2021 to 2025, overhead wires are 87% more expensive. Some of the transformers are almost 90% more expensive,” Porter stated. “So our motivation is not for shareholders. Our motivation is to do what’s best for our customers.”
Attorney General Mayes argues that a 3% rate increase would suffice for APS to maintain its service standards. She criticizes the current proposal, claiming it unjustly burdens average consumers to benefit large energy users, such as data centers. “It’s not fair for corporate America to ask average Arizonans who are barely making it to foot the bill for their data centers they should be paying for themselves,” Mayes commented. “If [APS] were to win this rate case, it would be a huge wealth transfer from average Arizonans to this giant, multi-billion-dollar corporation.”
Mayes’ office has officially contested the proposed rate hike with the Arizona Corporation Commission, and a judicial review is anticipated in May. Despite the challenge, Porter insists that a smaller rate adjustment would compromise the reliability of the grid and hinder long-term investments.
Porter further addressed the concern about data centers, noting they account for only a small fraction of the total energy demand. “Last year, on our hottest day of the year, we had peak energy demand,” Porter said. “About 5% of that demand came from data centers, so it’s a very small subset of our customer base.”
APS’s rate plan proposes a 45% increase for data centers compared to residential and small business customers. Porter explained that this structure is designed to cover the costs associated with serving data centers while maintaining grid reliability. “This is what it costs to provide [data centers] with the energy they need, but also maintain reliability on the grid, and it actually helps position those costs to stay within the data centers so [costs] don’t get shifted to our residential customers or our small business customers,” she said.
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