Justice Dept. seeks dismissal of xAI pollution suit

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1–2 minutes

Summary

The Justice Department asked a federal court to dismiss an NAACP lawsuit accusing xAI of illegal air pollution in Southaven, Mississippi.

Why this matters

The case tests whether the federal government can block citizen environmental lawsuits by citing national security. It also highlights tensions between rapid AI expansion, military use, and local pollution concerns.

The Trump administration moved to support Elon Musk’s xAI in a lawsuit alleging the company polluted residential areas in north Mississippi.

In a filing late Monday, the Justice Department asked a federal court in Mississippi to dismiss a lawsuit the NAACP filed in April against xAI and its subsidiary, MZX Tech. The lawsuit alleged the companies installed dozens of methane-gas turbines at an xAI data center in Southaven without air permits, in violation of the Clean Air Act, and sought to block operation of the machines.

In a 33-page memo, the government said the data center was being used to train and develop artificial intelligence models that are “critical to the economy and the Department of War,” and that the turbines were needed to power the facility. The filing also argued that the Clean Air Act allows the federal government to end such “citizen lawsuits.”

“The Department of Justice will not sit idly by while private organizations use environmental laws to undermine our national security,” Adam Gustafson, a deputy assistant attorney general in the Justice Department’s Environment and Natural Resources Division, said in a statement.

The filing said Grok, xAI’s chatbot, was “paramount” to national security. It also said a military version of the chatbot had helped U.S. forces “to deploy over 2,000 munitions to 2,000 distinct targets within 96 hours” in the war against Iran.

Lawyers for the NAACP said communities have long had the right to sue polluters and that the Justice Department cannot simply end those cases. They said companies working with the federal government still must comply with environmental law.

xAI has two data centers in the region, known as Colossus 1 and Colossus 2. Colossus 2 occupies 1 million square feet in Southaven. Colossus 1 is in Memphis, near historically Black neighborhoods that residents say have long faced pollution concerns.

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