A federal lawsuit over the Southaven xAI turbines will move forward. On Monday, Oct. 19, a judge in the U.S. District Court for the Northern District of Mississippi denied the U.S. Department of Justice’s request to throw out the NAACP’s Clean Air Act case against Elon Musk’s artificial intelligence company, now known as SpaceXAI.
U.S. District Judge Debra Brown ruled that the federal government cannot end a citizen lawsuit on its own, according to the Southern Environmental Law Center (SELC), which represents the NAACP with Earthjustice, and to published reports. The ruling lets the case continue. It does not decide whether the company broke the law.
What the Southaven xAI turbines lawsuit claims
The NAACP filed suit in April 2026. It says the company ran dozens of methane gas turbines at its Southaven power plant before it had an air permit, which would violate the Clean Air Act, Action News 5 reported. The plant supplies electricity to the company’s Colossus 2 data center across the state line in South Memphis.
The Mississippi Department of Environmental Quality issued an air permit for 27 gas-fired turbines at the site in March 2026. The lawsuit focuses on the period before that permit was granted.
According to SELC, the plant could emit more than 5,000 tons of nitrogen oxides, more than 400 tons of fine particulate matter and more than 47 tons of formaldehyde each year. The groups link those pollutants to asthma, heart disease and other health problems. The company has not been found liable for any violation.
Why the Justice Department wanted the case dismissed
The Justice Department stepped into the case and asked the court to dismiss it. In its filing, the department argued that ending the suit “accords with federal policy, national security, and the public interest,” Action News 5 reported. It said the company’s expansion is a national priority and that the federal government uses the company’s Grok chatbot in national security and military work.
Judge Brown said those national security arguments did not bear on whether the government had the power to dismiss the lawsuit. Here is what the ruling did:
Denied the Justice Department’s motion to dismiss the NAACP’s lawsuit
Held that the government cannot unilaterally block a Clean Air Act citizen suit when it is not prosecuting the same violations itself
Allowed the federal government to remain in the case as an intervenor
The order came shortly after the Fifth Circuit Court of Appeals denied the Justice Department’s request to pause the district court case, SELC said.
Reaction and what comes next
“The court made clear today that the law applies to everyone, including the federal government,” said Abre’ Conner, the NAACP’s director of environmental and climate justice. SELC senior attorney Patrick Anderson called the ruling a major step toward protecting communities in North Mississippi and Memphis.
The case now goes back to the district court. No hearing dates have been announced.
The lawsuit is one of several issues around the company’s Southaven operations. In recent weeks, the company has offered to buy homes near the power plant and has bought property and leased a warehouse in the city. Residents near the plant have complained about noise. DeSoto County News will follow the case as it moves forward.
