EPA Clarifies Permit Requirements for Gas Turbines, Impacting xAI's Memphis Data Center

The Environmental Protection Agency (EPA) has announced that all methane gas turbines, including those intended for temporary use, require construction and air permits. This clarification impacts xAI's data center operations in Memphis, Tennessee, where the company has been utilizing gas turbines without the necessary permits.

In June 2024, xAI began operating its South Memphis data center, installing numerous methane gas turbines without obtaining the required permits. Aerial images from April 2025 revealed 35 turbines at the site, exceeding the 15 for which xAI had applied for permits.

Local organizations, including the Southern Environmental Law Center (SELC) and the NAACP, have raised concerns about the environmental impact of these unpermitted turbines on nearby communities. In June 2025, the SELC, on behalf of the NAACP, issued a 60-day notice of intent to sue xAI for violating the Clean Air Act.

In July 2025, the Shelby County Health Department granted xAI an air permit for 15 turbines, allowing continuous operation. However, the EPA's recent clarification emphasizes that all such turbines, regardless of their intended duration of use, are subject to federal permitting requirements.

Amanda Garcia, a senior attorney at the SELC, stated, "This decision makes it clear that companies are not—and have never been—allowed to build and operate methane gas turbines without a permit and that there is no loophole that would allow corporations to set up unpermitted power plants."

The EPA's clarification underscores the necessity for companies like xAI to comply with federal environmental regulations, ensuring that all gas turbine operations are properly permitted to protect air quality and public health.