The Shelby County Health Department has granted an air permit for Elon Musk’s xAI data center in Memphis, allowing the company to keep operating gas turbines that power the Grok chatbot. The decision follows hundreds of public comments, repeated community protests, and a threatened lawsuit alleging violations of the Clean Air Act.
The permit does not end the dispute. Local activists, the NAACP, and the Southern Environmental Law Center are still focused on whether the project should have been operating turbines before the permit was issued, how many turbines have been active at the site, and what the air pollution burden means for nearby residents.
What the permit allows
The new permit from the Shelby County Health Department allows xAI to operate 15 turbines on the Memphis site until 2027. The turbines are part of the onsite power setup for the company’s supercomputer, Colossus, which xAI says it built in just 122 days.
The project began drawing public attention after the Memphis Chamber of Commerce announced in June that xAI had chosen a Memphis site for its new supercomputer. The campus is located at a former manufacturing facility, where xAI quickly began installing mobile gas turbines.
According to the source article, Colossus was built using 100,000 Nvidia H100 GPUs. That scale helped xAI move quickly in the race to build advanced artificial intelligence systems, alongside rivals OpenAI, Google, and Anthropic.
But speed is central to the controversy. Opponents argue that the company moved ahead with a power setup that raised significant air pollution questions before the permitting issue was resolved.
Why residents object
xAI’s Memphis campus is in Boxtown, described in the source article as a predominantly Black community with a history of industrial projects that cause pollution. Gas turbines can emit nitrogen oxides, which create smog, and Memphis already has some of the highest child asthma rates in Tennessee.
Since xAI began running the turbines, residents have met and rallied against the project. Their objections are not only about one facility. They are about whether another industrial operation is being added to an already burdened part of South Memphis.
KeShaun Pearson, the leader of Memphis Community Against Pollution, criticized the permit decision sharply. “I am horrified but not surprised,” Pearson said. “The flagrant violation of the Clean Air Act and the disregard for our human right to clean air, by xAI’s burning of illegal methane turbines, has been stamped as permissible by the Shelby County Health Department. Over 1,000 people submitted public comments demanding protection and got passed over for a billionaire’s ambitious experiment.”
That statement captures the main community concern: residents do not see the permit as a technical approval alone. They see it as a decision about whose health concerns are prioritized when a fast-moving AI infrastructure project arrives.
The Clean Air Act dispute
Under the Clean Air Act, major sources of emissions, including a cluster of gas turbines, need a permit known as a Prevention of Significant Deterioration (PSD) permit. Shelby County Health Department officials told local reporters in August that such a permit was not necessary for xAI because the turbines were not designed to be permanent.
xAI later applied for a permit with the Shelby County Health Department in January, months after it first began running the turbines. That timeline is one reason environmental advocates continue to challenge the project.
Last month, the NAACP and the Southern Environmental Law Center announced that they intended to sue xAI for allegedly violating the Clean Air Act. After the permit decision, SELC said it was “evaluating [its] options.”
SELC senior attorney Amanda Garcia also criticized the county’s decision. “The decision to give xAI an air permit for its polluting gas turbines flies in the face of the hundreds of Memphians who spoke out against the company’s permit request,” Garcia said in a press release. “Instead of confronting long-standing air pollution problems in South Memphis, the Shelby County Health Department is turning a blind eye to obvious Clean Air Act violations in order to allow another polluter to set up shop in this already-overburdened community without appropriate protections.”
The turbine count remains a flashpoint
The permit authorizes 15 turbines through 2027, but the number of turbines previously operating at the facility has been disputed. In June, Memphis mayor Paul Young wrote in an op-ed in the Tennessee Commercial Appeal that xAI was operating 21 turbines.
SELC says aerial footage it took in April showed as many as 35 turbines operating at the site. xAI did not immediately respond to WIRED’s request for comment, including questions about how many turbines it was currently operating. Shelby County also did not immediately respond to a request for comment.
xAI welcomed the permit decision in a statement posted to X. “Our onsite power generation will be equipped with state-of-the-art emissions control technology, making this facility the lowest emitting of its kind in the country. We look forward to being a valued partner to the Memphis Community for years to come.”
An environmental consultant for xAI told the Commercial Appeal that the turbines would include emissions-reduction technology, as required by the permit.
What happens next
The permit gives xAI a path to continue operating 15 turbines, but it does not resolve the conflict around the Memphis data center. Activists have already signaled that they may challenge the decision.
Pearson told WIRED, “The people are awake and ready to fight back,” adding, “You can expect to see an appeal!”
The source article also describes emissions concerns documented by Sharon Wilson, a certified optical gas imaging thermographer. In May, Wilson traveled to Memphis to film emissions from the site using a special optical gas imaging camera that records usually invisible emissions. She alleged to WIRED that what she saw in Memphis was one of the densest clouds of emissions she had ever seen.
“I expected to see the typical power plant type of pollution that I see,” Wilson said. “What I saw was way worse than what I expected.”
For xAI, the Memphis site is tied to the rapid buildout of Colossus and the infrastructure behind Grok. For residents and environmental groups, it has become a test of how air permitting, public health, and AI data center power demands are handled when a project moves fast in a community already concerned about pollution.