The US Department of Justice has stepped into a pollution lawsuit, not to protect public health, but to protect a private AI company's ability to keep running unpermitted gas turbines next to homes where people are already struggling with high rates of asthma.
The NAACP filed its lawsuit in April, accusing xAI of violating the Clean Air Act by operating 27 gas turbines without the permits that federal law requires. Those turbines power Colossus 2, xAI's second major data center near Memphis, Tennessee. The area is one of the worst in the country for asthma. It ranked second nationally in asthma-related emergency room visits in 2024.
By the time the NAACP asked the court for an emergency order to stop the turbines, internal emails obtained by the Southern Environmental Law Center showed the number had quietly grown from 27 to 57. Many of those additional turbines were added after the lawsuit was filed. According to the SELC, that expansion brought a roughly 111 percent increase in nitrogen oxide emissions, an 83 percent increase in fine particle pollution, and an 88 percent increase in formaldehyde.
The DOJ's response was not to dispute the pollution figures. Instead, it filed a brief arguing that shutting the turbines down "threatens American national, economic, and energy security." The Pentagon's own chief AI officer filed a separate declaration saying that Grok, xAI's chatbot, runs on classified military networks and supports active missions including recent military operations against Iran.
The military context is real. The Pentagon signed a contract worth up to $200 million with xAI in July 2025. Defense Secretary Pete Hegseth announced in January 2026 that Grok would be integrated across both unclassified and classified Pentagon networks. The DOJ filing states that only four AI models support mission-critical operations on top-secret classified networks, and Grok is one of them.
But here is what the national security framing actually does legally: it gives the court a reason to dismiss a pollution case without ever ruling on whether xAI broke the Clean Air Act. The company's original defence was that the turbines were "mobile" and therefore exempt from permitting. A single turbine in this setup is 14 feet tall, nearly 100 feet long, and weighs over 200,000 pounds. Courts have generally required plaintiffs to point to a specific broken rule, and xAI's lawyers have argued the permitting rules simply do not apply to their setup. The DOJ is now adding a second layer: even if the rules were broken, the military dependency makes it untouchable.
This case matters for anyone running or procuring from large operations that depend on AI infrastructure. The pattern here is that AI companies are building power-hungry facilities faster than the electrical grid can support them, so they install their own gas generators as a temporary fix and dare regulators to stop them. xAI did this at its first Memphis site, received a legal threat, removed some turbines, and obtained permits for the rest. At Colossus 2, it repeated the same approach at twice the scale, and then doubled the turbines again after being sued.
The precedent being tested is whether a private company with a government contract can use that contract as a shield against environmental law. If the court dismisses the case on national security grounds, it will not be lost on other AI companies building data centers near residential areas. The question of who bears the cost of AI's power appetite, in this case quite literally in air quality and health outcomes, remains entirely unresolved.