Federal court lets NAACP pursue Clean Air Act claims against xAI

A federal judge in Mississippi has declined to dismiss an NAACP lawsuit alleging that xAI, the AI company owned by SpaceX and rebranded as SpaceXAI, violated the Clean Air Act by running gas turbines without permits at its Colossus data centres near Memphis and at a power plant it is building in Southaven, Mississippi. The ruling, released late on Friday according to CNBC, allows the claims to proceed and keeps in litigation a dispute over the power supply for large AI data centres in Greater Memphis.

The Southern Environmental Law Center and Earthjustice filed the suit on behalf of the NAACP in the US District Court for the Northern District of Mississippi in April 2026. CNBC reports the suit alleges that between August and December 2025, xAI and subsidiary MZX Tech installed and operated 27 gas turbines in Southaven "without an air permit or regard for the health and safety of people living nearby". TechCrunch reports that the SELC said the company had "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 argued that the turbines were "mobile" and exempt from permitting, that the NAACP lacked a right to sue under the Clean Air Act, and that citizen suits of this kind were unconstitutional.

Judge Debra M. Brown rejected those arguments. "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," she wrote, according to both accounts. TechCrunch also quotes her as writing that citizen-suit plaintiffs "sue on their own behalf, in their own name, and seek penalties that redress harm to themselves", and so "are not exercising the federal government's executive power". The ruling follows the same court's rejection of a Department of Justice request to end the case; CNBC says that decision came about two weeks earlier, while TechCrunch says a similar DOJ motion was denied earlier this month. The supplied accounts do not report any ruling on the substance of the pollution allegations.

The NAACP's director of environmental and climate justice, Abre' Connor, called the decision "another important victory in our effort to hold xAI accountable", according to TechCrunch, and said the courts had "repeatedly rejected attempts by xAI and the DOJ to dismiss the NAACP's Clean Air Act case". SpaceX did not immediately respond to CNBC's request for comment; TechCrunch said it had reached out to SpaceX. TechCrunch reports that the case is proceeding as public opinion has turned sharply against data centres, with New York recently passing a moratorium on new data centres and other state and local governments considering similar measures; it also reports that the backlash prompted Amazon and Microsoft to promise to stop using non-disclosure agreements in dealings with government agencies, and that data centres could be a significant factor in the imminent US midterm elections.