xAI Powers Mississippi Data Center With Eight Converted Jet Engines

Eight converted jet engines are now powering an xAI data center in Mississippi, and the permits allow a 25 percent higher limit for pollutants known as volatile organic compounds. The installation is legal at the state level. Whether it survives a legal challenge is another question.

The Southern Environmental Law Center has already challenged Mississippi's decision to approve the turbines, according to The New York Times. The group argues that xAI has failed to provide guarantees that the jet-powered turbines meet emissions standards for specific pollutants, including formaldehyde. It also accuses xAI of what the report terms the "undercounting" of projected emissions from the data center's power sources.

This is not the first clash. The same group previously sued xAI over its use of gas generators without the required permits in an area with more than 100,000 inhabitants.

Who builds these turbines?

The generators come from ProEnergy, a Missouri-based company that repurposes unused General Electric turbines of the type typically attached to Boeing airplanes. ProEnergy moved quickly into the data center power market after it became clear that energy demand was outpacing the ability of traditional utility companies to keep up.

Each turbine can produce up to 50 megawatts of electricity. That figure would normally keep around 15,000 homes running. Eight turbines therefore give the facility a theoretical ceiling of 400 megawatts of on-site generation.

Why are data centers turning to jet engines?

Power availability has long constrained data centers, both operating ones and those still on the drawing board. A July 2026 report predicted that data centers would consume 20 percent of all U.S. power by 2035. That forecast was an 83 percent increase over the same projection made seven months earlier — a revision speed that suggests forecasters are struggling to keep pace with demand.

Yet the buildout is faltering. As of April this year, half of data center buildouts had been canceled or delayed, due in part to a lack of power. That is a specific problem for xAI. Elon Musk said in August that xAI would increase its data center capacity by seven times before the end of 2027. Delays and cancellations have the potential to derail those plans.

What does this mean for local residents?

The environmental concerns are concrete. The volatile organic compounds covered by the higher permit limits, paired with the expulsion of carbon monoxide, have environmentalists warning that using jet engines to power data centers is a step in the wrong direction. The turbines hold state-level permission and permits, so the legal fight turns on whether emissions guarantees — or the lack of them — invalidate that approval.

Public sentiment around data centers has soured in recent months amid power issues and concerns over how much water these facilities consume. Converted jet engines could ease one of those pressures by removing facilities from strained grid queues. The pollution they generate, however, seems unlikely to reassure local residents.

The commercial logic, and its limits

For xAI, the calculation is straightforward. A sevenfold capacity expansion by the end of 2027 does not wait for utility interconnects that may arrive years late. On-site generation at 50 megawatts per turbine buys time.

But the strategy carries a cost that is not denominated in megawatts. A formal legal challenge from the Southern Environmental Law Center could stall operations, and the prior lawsuit over unpermitted gas generators shows a pattern of friction with regulators. Musk's 2027 target depends on power that is available, permitted, and defensible in court — and jet engines currently satisfy only the first of those three conditions.