The Pulse
Judge Blocks EPA’s Bid to End NAACP’s xAI Pollution Suit
A federal judge in Mississippi rejected the Trump administration’s attempt to dismiss the NAACP’s Clean Air Act lawsuit over xAI’s Colossus gas plant. The United States may join the case, but Judge Debra Brown ordered it to explain its role
AI.info Team · Written with AI · fact-checked ·
On October 19, U.S. District Judge Debra M. Brown allowed the federal government to join the NAACP’s pollution lawsuit against xAI but denied its bid to end the case. The order says the Clean Air Act gives the Environmental Protection Agency’s administrator a right to intervene, not the power to dismiss a citizen suit over the plaintiffs’ objection. The ruling leaves the NAACP’s allegations against the operators of the Colossus gas plant in Southaven, Mississippi, unresolved.
Brown wrote that “nothing in the Clean Air Act allows the Administrator to unilaterally dismiss a citizen suit upon intervention.” The order is in National Association for the Advancement of Colored People v. X.AI Corp.
Brown Gives the EPA a Seat, Not a Veto
The NAACP and Mississippi State Conference of the NAACP filed suit on April 14 against X.AI Corp. and MZX Tech LLC. They allege the companies built and operated the Colossus Gas Plant without permits required under the federal Clean Air Act and Mississippi’s State Implementation Plan. The court has not decided whether the defendants violated either law.
The plaintiffs seek an order barring the plant from operating except in compliance with the law and requiring the installation and use of the best available pollution-control technology. They also seek civil penalties of up to $124,426 per day for each violation, along with legal costs and attorney fees. On June 12, they separately asked the court to stop plant operations until the defendants obtained permits and installed pollution controls.
The United States moved on June 15 to intervene and dismiss the suit, then amended its filing on July 7 to say it was acting on behalf of the EPA administrator. Brown concluded that the Clean Air Act gives the administrator an unconditional right to intervene. But the law’s grant of intervention does not allow the government to dismiss claims brought by the NAACP.
The Law Allows a Different Route to Block a Citizen Suit
The administration argued that the government’s enforcement authority and Federal Rule of Civil Procedure 41 gave it the power to dismiss the case. Brown found that Rule 41 lets a plaintiff dismiss its own action; it does not authorize one plaintiff to end another plaintiff’s lawsuit. She also rejected the claim that the Clean Air Act’s intervention provision supplies that authority.
The act does specify a circumstance in which government enforcement can block a citizen suit: the EPA or a state must have started and be diligently prosecuting its own case to require compliance. The government had not brought an enforcement action against the defendants and did not argue that this provision applied. Brown reasoned that treating intervention alone as a dismissal power would make the act’s separate enforcement requirement pointless.
The order does not decide the administration’s reasons for opposing the NAACP’s lawsuit. Brown said those arguments did not answer the procedural question before her: whether the government had authority to dismiss the case. Nor does the ruling decide the defendants’ liability or whether the requested injunction should issue.
October 23 Is the Next Deadline
The government filed a notice of appeal on September 18, claiming Brown had effectively denied its motion during an August status conference. Brown ruled that the appeal was premature: at that point, she had indicated an intention to rule but had not issued an order. The Fifth Circuit also denied the government’s request to pause the district-court proceedings while the appeal was pending.
Brown’s October 19 order allows the United States to intervene, but requires it to file a pleading explaining its claims or defenses by October 23 if it wants to take part. Any response to that pleading, if one is required, is due October 30. The order says the defendants’ separate motion to dismiss and other pending requests will be addressed separately.