A federal judge in Mississippi has refused to dismiss the NAACP's Clean Air Act lawsuit against xAI, keeping alive a case that tests whether the gas turbines powering the company's Colossus data center near Memphis ever needed air permits.
Judge Debra M. Brown denied xAI's motion to dismiss. The suit, brought by the NAACP and litigated by the Southern Environmental Law Center, alleges the company "installed and operated at least 35 combustion turbines and other sources of air pollution at the Colossus site without ever obtaining the necessary preconstruction or operating air permits."
xAI advanced three defenses: that the turbines are "mobile sources" and therefore exempt from permitting, that the plaintiffs lacked standing, and that the Clean Air Act's citizen-suit provision is unconstitutional under Article II and the private nondelegation doctrine.
Brown rejected all three. "Because the plaintiffs have statutory standing under the Clean Air Act, because the combustion turbines are not 'mobile sources' under Mississippi's [State Implementation Plan], and because the citizen suit provision does not violate Article II of the Constitution or the private nondelegation doctrine, the plaintiffs' claims will proceed," she wrote. On the constitutional argument she added: "Because citizen suit plaintiffs sue on their own behalf, in their own name, and seek penalties that redress harm to themselves, they are not exercising the federal government's executive power."
Not the first setback
It is the second defeat of its kind in a matter of weeks. An earlier, similar motion from the Department of Justice — which had moved to shut the case down — was denied earlier this month.
"The courts have repeatedly rejected attempts by xAI and the DOJ to dismiss the NAACP's Clean Air Act case, affirming our right to pursue justice for communities impacted by pollution," said Abre' Connor, the NAACP's director of environmental and climate justice. "Our position has been clear: xAI cannot operate gas turbines without the required permits."
Why the ruling travels beyond Memphis
The decision lands as public opinion has turned sharply against data centers. New York recently passed a moratorium on new facilities, other states and localities are weighing similar steps, and on Tuesday voters in 10 states decide 41 data-center measures. The pressure has already pushed Amazon and Microsoft to promise they will stop using non-disclosure agreements in their dealings with government agencies.
For the industry, the substance matters more than the procedural loss. Had the "mobile source" argument carried, a whole class of gas-turbine plants could have run without air permits — a construction pattern several AI companies have used to bring data centers online at record speed.
TechCrunch describes xAI as a SpaceX-owned company. SpaceX did not immediately comment.
