Judge lets NAACP lawsuit over xAI's Colossus data center pollution proceed

A federal judge has denied a motion by xAI seeking to dismiss an NAACP lawsuit that accuses the SpaceX-owned AI company of failing to obtain the permits needed to operate the gas turbines powering its Colossus data center outside Memphis.

The suit, brought by the Southern Environmental Law Center on the NAACP's behalf, says xAI "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." It also accuses the company of violating the Clean Air Act.

xAI argued the case should be thrown out on two grounds: that the turbines are exempt from permitting requirements because they are mobile, and that the plaintiffs lacked standing to sue.

Judge Debra M. Brown rejected both. "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.

She also addressed xAI's argument that citizen suits of this kind are unconstitutional. "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," Brown wrote.

TechCrunch has reached out to SpaceX for comment. In a statement, the NAACP's director of environmental and climate justice, Abre' Connor, called the outcome "another important victory in our effort to hold xAI accountable," adding that "the courts have repeatedly rejected attempts by xAI and the DOJ to dismiss the NAACP's Clean Air Act case." A similar motion to dismiss from the Department of Justice was denied earlier this month.

The lawsuit is advancing as public opinion turns sharply against data centers. New York recently passed a moratorium on new data centers and other state and local governments are weighing similar measures; the backlash also prompted Amazon and Microsoft to promise to stop using NDAs in their dealings with government agencies, and it could be a significant factor in the imminent U.S. midterm elections.

For xAI, the immediate consequence is that there is no quick procedural exit: the case now moves toward substantive litigation over permits, monitoring and penalties. What courts ultimately do with the "mobile source" label will matter well beyond Memphis, because gas turbines have become a common way to power AI campuses racing to come online, and this ruling gives regulators and community groups a tested route to challenge them.