Key Contacts
Federal Court Rejects EPA Attempt to Dismiss Clean Air Act Citizen Suit Against xAI Data Center
A recent federal court decision involving xAI’s data-center power generation illustrates a potential limitation on the litigation protection that federal support for data-center development offers: even where the U.S. Environmental Protection Agency (“EPA”) opposes a private Clean Air Act (the “CAA” or “Act”) enforcement action, that opposition may not be enough to stop litigation brought under the Act’s citizen-suit provision.
In an October 19, 2026 Opinion and Order in National Association for the Advancement of Colored People, et al. v. X.AI Corp., et al., No. 3:26-cv-74-DMB-JMV (N.D. Miss.), the U.S. District Court for the Northern District of Mississippi permitted the United States, on behalf of the EPA Administrator, to intervene in a CAA citizen suit against X.AI Corp. and MZX Tech LLC (collectively “xAI”) as a plaintiff. Importantly, however, the Court rejected the United States’ attempt to dismiss the citizen suit under Federal Rule of Civil Procedure Rule 41 as well as pursuant to EPA’s authority under the CAA. The Court also rejected the government’s argument that principles of constitutional avoidance supported construing the CAA to give EPA authority to terminate a citizen suit when the Executive Branch has determined that the litigation should not proceed.
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