xAI runs 59 unpermitted gas turbines for Colossus 2, Reuters says

The number that matters in this week's Reuters investigation isn't the parameter count of xAI's next model, it's the turbine count sitting behind it. Reuters reported that xAI has installed 59 natural gas turbines to feed its Colossus 2 data center without securing federal clean air permits, based on communications between the company and regulators. That is more than double the 27 unpermitted turbines the company itself acknowledged in January, and 57 of them sit off-grid in Southaven, Mississippi, just across the state line from the Memphis facility that supports the Grok chatbot.

The environmental math is why this matters beyond a permitting dispute. A Reuters analysis based on manufacturer emissions profiles estimated that 30 turbines running continuously at 80% of capacity could emit nearly 2,500 short tons of nitrogen oxide, 4,000 short tons of carbon monoxide, and 22 short tons of formaldehyde annually. Nicholas Mailloux, a postdoctoral researcher at the University of Wisconsin-Madison, told Reuters that the NOx figure alone would put the site "up there with some of the heaviest polluting natural gas power plants across the entire country." The turbines sit near predominantly Black communities that, by Reuters' reading of government data, are already estimated to suffer disproportionately high rates of lung disease.

The politics have already caught up to the metal. The US justice department filed on June 15 arguing that restricting the turbines could threaten national security interests because xAI's systems support US military operations, including operations involving Iran. Mississippi regulators, for their part, issued a permit in March for 41 permanent gas-fired turbines at the site, the approval landing three weeks after the state's only public hearing on the project.

The honest caveat is that Reuters' pollution numbers are a model based on manufacturer profiles and an assumed duty cycle, not measured readings downwind of the site, and the turbine count comes from correspondence with regulators rather than an on-site inventory. Take the specifics as reported, not settled. The reporting also doesn't say how much of Colossus 2's real runtime load is coming from these turbines today versus the grid.

What's worth watching is who this empowers. Community groups now have a very concrete federal test case on whether an AI infrastructure buildout can outrun the Clean Air Act, and rival data-center operators with permitted, disclosed power supply just picked up a quiet reputational edge with any enterprise buyer who cares about the environmental profile of the compute they are renting.