By ASN News Editorial Desk
A federal judge in Mississippi has refused to throw out the NAACP’s Clean Air Act lawsuit against SpaceX’s artificial intelligence division, allowing the case over gas turbines powering its Memphis-area data centers to move forward.
The Ruling
U.S. District Judge Debra M. Brown of the Northern District of Mississippi denied the motion to dismiss in an opinion released late Friday. The lawsuit will now proceed in federal court.
In rejecting the company’s arguments, the judge wrote: “Because the plaintiffs have statutory standing under the Clean Air Act, because the combustion turbines are not ‘mobile sources’ under Mississippi’s SIP, and because the citizen suit provision does not violate Article II of the Constitution or the private nondelegation doctrine, the plaintiffs’ claims will proceed.”
What the Lawsuit Alleges
The NAACP filed the suit in April 2026, represented by the Southern Environmental Law Center and Earthjustice. It alleges that xAI and its subsidiary MZX Tech installed and operated 27 gas-fired combustion turbines in Southaven, Mississippi, between August and December 2025, without an air permit, to power the company’s massive Colossus AI data centers in the Greater Memphis area.
According to the suit, the turbines emit smog-forming pollutants and particulate matter that can increase health risks for people living nearby. The Southern Environmental Law Center says the plant could emit over 5,000 tons of nitrogen oxides, 400 tons of fine particulate matter, and 47 tons of formaldehyde annually.
SpaceX acquired xAI in February 2026, creating SpaceXAI LLC to run its AI operations. The suit targets how the turbines have been running in the meantime.
The Arguments the Judge Rejected
SpaceXAI had argued the case should be tossed on three grounds: that the turbines qualified as mobile equipment and were therefore exempt from certain permitting requirements under Mississippi’s state implementation plan; that the NAACP lacked standing to bring the suit; and that the Clean Air Act’s citizen-suit provision was unconstitutional.
The judge rejected each argument.
The Wider Fight
The ruling is the second legal setback for the company in the case in as many weeks. About two weeks earlier, the same court rejected a request from the U.S. Department of Justice to end the case; the department had argued that the Colossus 2 facility supports crucial national security operations. Earlier in October, the court also allowed the Environmental Protection Agency to intervene in the lawsuit.
SpaceXAI has said its use of temporary gas turbines is part of a transition toward permanent power infrastructure, with the remaining temporary units expected to be removed by July 2027, and a permanent 1.2-gigawatt facility with 41 turbines that received a Clean Air Act permit in March 2026. The company has also said air monitoring data show local conditions continue to meet or exceed Environmental Protection Agency standards.
What Happens Next
Losing a motion to dismiss is not losing the case. It means the judge found the claims serious enough to proceed. The company will now have to defend its turbine operations on the merits, and the court will eventually decide whether the turbines operated in violation of the Clean Air Act and what remedies, if any, are appropriate. SpaceX did not immediately respond to requests for comment.
