By Company
xAI Data Center Lawsuits: The Clean Air Act Case and the 10,000 Person Noise Class Over Colossus's Turbines
xAI's Colossus data centers in Memphis and Southaven are the subject of two federal lawsuits over the same gas turbines: the NAACP's Clean Air Act citizen suit over unpermitted operation, with the Justice Department intervening on xAI's side, and a proposed class action by more than 10,000 Southaven residents over the noise. The full record, sourced.
power plant site serving the Colossus data center in Southaven, Mississippi, photographed 2023-08-20. The plant stands on the pad of a demolished power station off Stanton Road, with houses a few hundred yards northwest through the trees. This 2023 imagery shows the foundations before the gas turbines were installed on them.
USDA Farm Service Agency / USGS National Map, National Agriculture Imagery Program. Cropped from NAIP 0.6 m aerial imagery, scene m_3409008_ne_15_060_20230820. (original)
xAI on the tracker
- Tracker entries
- Two: NAACP v. xAI (Clean Air Act, filed April 2026) and Haley v. xAI (turbine noise class action, filed June 8, 2026), both pending in the Northern District of Mississippi
- The turbines
- Methane gas turbines powering Colossus 2 in Southaven, Mississippi; per the noise complaint, from 3 to 57 units in under a year, with a permit for 41 permanent turbines
- Government posture
- The Mississippi Department of Environmental Quality has said the turbines are covered by mobile source provisions; the U.S. Department of Justice moved to intervene on xAI's side in the NAACP case
- Footprint
- Colossus 1 in South Memphis, Tennessee; Colossus 2 in Southaven, Mississippi
Key Takeaways
- xAI faces two federal lawsuits over the same gas turbine fleet at Colossus 2 in Southaven, Mississippi: the NAACP's Clean Air Act citizen suit, filed April 2026, and a proposed class action by more than 10,000 residents over the noise, filed June 8, 2026.
- The Clean Air Act case asks whether xAI may lawfully run the turbines at all without permits, with a preliminary injunction motion pending; the state environmental agency has sided with xAI's mobile source theory and the Justice Department moved to intervene on the company's behalf.
- The noise case asks for money: residents report readings above 70 dBA at their property lines from a fleet the complaint says grew from 3 to 57 turbines in less than a year, and they plead nuisance, negligence, negligence per se, and emotional distress.
- xAI is the only operator on the tracker facing both a regulatory suit and a damages class over the same equipment, and the only one whose fastest path to power runs through on-site gas generation next to homes.
- The cases began in Memphis, where xAI's Colossus 1 turbines drew the NAACP's first 60 day notice in June 2025, before the fight moved across the state line.
In this article
Has xAI been sued over its data centers? Twice, over the same turbines. Elon Musk's xAI powers its Colossus 2 data center in Southaven, Mississippi with on-site methane gas turbines rather than waiting for the grid, and that decision has produced two federal cases in the Northern District of Mississippi. The first is the NAACP's Clean Air Act citizen suit, filed in April 2026 with the Southern Environmental Law Center and Earthjustice, over operating the turbines without permits; the Mississippi Department of Environmental Quality has said the units are covered by the Act's mobile source provisions, and the U.S. Department of Justice moved to intervene on xAI's side. The second is Haley v. xAI, a proposed class action filed June 8, 2026 by Southaven residents over the noise, on behalf of more than 10,000 people, alleging a fleet that grew from 3 to 57 turbines in under a year and readings above 70 decibels at their property lines. One case could shut the turbines down; the other could make every day they run expensive.
Every case on the tracker
- Active litigationMississippiNAACP v. xAI: The Clean Air Act Fight Over Colossus's Gas Turbines
Pending, U.S. District Court, N.D. Mississippi
The NAACP, represented by SELC and Earthjustice, is suing xAI in federal court over 27 allegedly unpermitted gas turbines powering the Colossus 2 data center in Southaven, Mississippi, after a parallel permit fight in Memphis. Status, stakes, and what it means for data center neighbors everywhere.
- Active litigationMississippiHaley v. xAI: 10,000 Southaven Neighbors Sue Over the Roar of 57 Gas Turbines
Pending, U.S. District Court, N.D. Mississippi (filed June 8, 2026)
On June 8, 2026, Southaven, Mississippi residents filed a federal class action against xAI, its subsidiary MZX Tech, and SpaceX over near-constant noise and vibration from the gas turbine fleet powering the Colossus 2 data center, a fleet the complaint says grew from 3 to 57 turbines in under a year. More than 10,000 people are in the proposed class. What the suit alleges, how it differs from the NAACP's Clean Air Act case, and what it means for anyone living near on-site power.
Every xAI site in the registry
5 sites on the public record in 2 states: 4 operating, 1 under construction, 0 permitted, 0 proposed. 2 carry documented opposition or litigation. 3.2 GW planned. Most contested first.
- xAI Southaven · Southaven, MSOperating · 2 GW · In litigation
- Colossus · Memphis, TNOperating · 1.2 GW · In litigation
- Colossus 2 (Whitehaven) · Memphis, TNOperating
- MACROHARDRR (xAI Southaven Data Center III) · Southaven, MSOperating
- Minihard · Memphis, TNUnder construction
Two cases, one turbine fleet
The NAACP case is regulatory. It argues that a fleet of gas turbines powering a data center is a major stationary source under the Clean Air Act and needs permits xAI never obtained; xAI and the state agency argue the turbines are portable, mobile sources outside that regime. The plaintiffs asked for a preliminary injunction in May 2026. The Justice Department's move to intervene on xAI's side, in July 2026, made the case a test of the federal government's position on on-site power for AI as much as of one company's permits. Our full report on NAACP v. xAI follows it.
The Southaven class action is private and about money. Its plaintiffs do not care whether the turbines are permitted; they say the roaring, rumbling, and low-frequency vibration are an unreasonable interference with thousands of homes and that residents are owed damages and compensation for lost property value. The alleged ordinance violation, readings above 70 dBA, supports a negligence per se theory. Our report on Haley v. xAI explains why it is the largest data center noise class filed to date.
What xAI's neighbors, and everyone else's, can take from it
On-site generation is becoming the industry's bridge wherever grid connections lag behind AI demand, and the xAI cases are the first full test of what neighbors can do about it: a citizen suit with a 60 day notice when permits are missing, and a nuisance class when the noise crosses the property line. Our air pollution claims guide and report on data center diesel generators cover the regulatory side; the noise guide covers the rest. Our free case review connects you with an independent attorney in our network who handles data center cases in your state, at no cost and with no obligation.
Frequently asked questions
Has xAI been sued over its data center?
Yes, twice. The NAACP, represented by the Southern Environmental Law Center and Earthjustice, filed a Clean Air Act citizen suit in April 2026 in the Northern District of Mississippi over gas turbines run without permits at Colossus 2 in Southaven. On June 8, 2026, Southaven residents filed a proposed class action of more than 10,000 people against xAI, MZX Tech, and SpaceX over the turbines' noise.
Why is the Justice Department involved in the xAI lawsuit?
In July 2026 the U.S. Department of Justice moved to intervene in the NAACP's Clean Air Act case on xAI's side, after signaling in June that it might. The Mississippi Department of Environmental Quality had earlier stated the turbines were protected by the Clean Air Act's mobile source provisions because they are portable units.
How many turbines does xAI have in Southaven?
According to the Southaven residents' class action complaint, the number of gas turbines at the site grew from 3 to 57 in less than a year after operations began around August 2025, and xAI's subsidiary MZX Tech holds a permit for 41 permanent turbines. The NAACP's suit, filed in April 2026, alleged 27 unpermitted turbines at that time.
Is a xAI data center disrupting your home?
Tell us what is happening. We will connect you with an independent attorney who handles data center cases in your state, free and with no obligation. These cases are commonly taken on contingency, so there are typically no upfront fees.
- Free case review
- Independent attorneys
- No obligation
Attorney or law firm handling data center matters? Speak with us