DOJ moves to dismiss NAACP suit over xAI pollution

DOJ asks – The Trump administration urged a federal court late Monday to throw out a NAACP lawsuit accusing xAI and its subsidiary MZX Tech of operating methane-gas turbines without air permits in Southaven, Mississippi. The government argues the turbines are necessary f

For communities in north Mississippi that have spent years living beside heavy pollution, the court filing landed like a wall—this time, built not by the polluters’ lawyers, but by the federal government.

Late on Monday. the Department of Justice told a federal court to throw out a lawsuit brought by the NAACP over claims that Elon Musk’s artificial intelligence company. xAI. is polluting residential neighborhoods in the region. The case targets xAI’s data center operations in Southaven. Mississippi. and argues the company is doing so in violation of the Clean Air Act.

The NAACP filed the lawsuit in April. It alleges that xAI and its subsidiary. MZX Tech. set up dozens of methane-gas turbines to power a data center in Southaven without air permits. The suit says those turbines emit toxic pollutants in violation of the Clean Air Act and asks a judge to block xAI from operating the machines.

In a 33-page memo filed in Mississippi federal court. the DOJ argued the data center is being used to train and develop AI models that it described as “critical to the economy and the Department of War. ” and that the turbines are necessary to power the facility. The government also contended that the Clean Air Act gives it authority to terminate “citizen lawsuits.”.

Adam Gustafson, a deputy assistant attorney general for the Justice Department’s Environment and Natural Resources Division, said the DOJ would not stand by while private organizations use environmental laws to undermine national security.

But the NAACP and its legal partners framed the government’s move as a shortcut around environmental enforcement. They argued that communities have long had the right to bring suits against polluters and that the government cannot simply quash those cases. They added that all companies—including those contracting with the federal government—must follow environmental laws.

“There is no moral or legal precedent for this…It’s a desperate attempt to protect wealthy tech companies from obeying the laws,” said Laura Thoms, the director of enforcement for Earthjustice, which is representing the NAACP along with the Southern Environmental Law Center.

The government’s filing leaned heavily on xAI’s national-security positioning through Grok. the chatbot at the center of xAI’s work. The DOJ wrote that Grok’s continued availability was “paramount” to national security and the military version of the chatbot had assisted U.S. forces “to deploy over 2,000 munitions to 2,000 distinct targets within 96 hours” in the war against Iran.

xAI’s technology has faced its own controversies, and the Justice Department’s filing referenced Grok’s broader public record—citing issues including nonconsensual deepfakes, sexualized images of woman and minors, and Grok referring to itself as “MechaHitler.”

Behind the legal fight is a data center operation that the NAACP says is already drawn to confrontation. xAI has two data centers in the region. nicknamed “Colossus 1” and “Colossus 2.” Colossus 2 is in Southaven and occupies 1 million square feet. Colossus 1 is located in Memphis and is described as being a few miles from historically Black neighborhoods that have long dealt with harmful pollution. Both sites have been met with community backlash and protests.

The NAACP alleges xAI has illegally installed and is operating 57 gas turbines at its Southaven facility—each one the size of a large bus. The group claims the data center has the capacity to emit more than 5. 000 tons of harmful nitrogen oxides per year. along with fine particulate matter and toxic chemicals like formaldehyde. It says those pollutants are tied to increases in asthma, heart disease, respiratory illnesses, and cancer.

Abre’ Conner, the director of environmental and climate justice for the NAACP, said Clean Air Act protections are “a bedrock insurance policy for communities to hold polluters accountable for decisions that cause them harm,” adding, “This should not be up for debate.”

xAI has not been insulated from other scrutiny either. Its central focus is Grok. and in recent weeks xAI entered partnerships with Google and Anthropic to rent space in its data centers for billions of dollars annually. Last week. SpaceX—xAI’s parent company—had the largest initial public offering in history. valuing it at more than $2 trillion and minting Musk as the world’s first trillionaire.

After Monday’s filing, xAI itself did not respond to a request for comment.

The dispute now turns on something more than turbines and paperwork. With the DOJ asking the court to dismiss the NAACP’s suit—arguing both national-security necessity and the ability to end “citizen lawsuits”—communities that allege they are living with dangerous pollution are left facing a question with real stakes: whether the Clean Air Act still works the same way when the government decides the case is no longer “idly by” the balance of private enforcement.

The sequence of facts is stark. The NAACP says turbines were installed and operating without air permits. and the suit seeks to stop that operation under the Clean Air Act. The DOJ says those turbines power AI work it considers essential to national security and that the government can terminate citizen enforcement under the same law. For residents near Colossus 1 and Colossus 2. the court’s response will determine whether the legal fight continues—or whether it is abruptly cut short by the department that is meant to enforce environmental protections.

Trump administration Department of Justice xAI Elon Musk NAACP lawsuit Clean Air Act Southaven Mississippi methane-gas turbines Grok national security citizen suits Adam Gustafson Earthjustice Southern Environmental Law Center Colossus 1 Colossus 2