Recent filings submitted to the Federal Energy Regulatory Commission (FERC) have highlighted the huge electricity demand from data center operations across the US.

These details were recently revealed by a handful of public utilities, who are required to publish a list of their largest electricity consumers during the past three years.

Further information on these projects, alongside links to the NPM DC database, can be found below.

Arizona Public Service

With Arizona having become a hotbed for industry expansion in recent years, it will come as no surprise to see the state’s largest utility, Arizona Public Service (APS), listing several data centers among its largest electricity consumers between 2022 and 2025.

Listed in alphabetical order, an 180 MW data center campus owned and operated by Aligned Data Centers features on this list. Located across 55 acres on the northern outskirts of the state’s capital, this campus comprises the developer’s PHX-01A, PHX-01B, PHX-01C DC buildings.

In 2022, the developer announced that it would be adding a fourth building to the site, known as PHX-05.

Compass Datacenters also features, with its DC campus located in Goodyear being one of APS’ 20 largest electricity consumers over the past three years. Compass first broke ground on this project during 2019, which, at full buildout, will comprise six DC buildings with a capacity of 212 MW.

The third data center listing for APS comes from Iron Mountain Data Centers, whose inaugural Phoenix DC, AZP-1, is another of the utility’s largest consumers.

Alongside AZP-1 in Phoenix, Iron Mountain has another operational DC known as AZP-2, alongside a third which is under development.

Data centers from Microsoft in Goodyear and Vantage in Phoenix were also listed by APS.

Northern Indiana Public Service Company

Listed as one of Northern Indiana Public Service Company’s (NIPSCO’s) 20 largest electricity consumers is a 20 MW data center owned by Digital Crossroad, known as DX-1, located on the site of the demolished coal-fired State Line Generating Station in Hammond on the Illinois/Indiana State border.

The developer claims to have an onsite substation with 100 MW+ capacity for potential future expansion, and plans to install a 1 MW solar farm to power non-critical portions of the campus.

The project was also listed on NIPSCo’s 2024 list of its largest consumers, but not 2023.

*This story was originally published exclusively for NPM subscribers.