SpaceXAI, Elon Musk's artificial intelligence company, disclosed Thursday that Mississippi environmental regulators say construction started at three of its Southaven sites before required stormwater permits were in place, with potential penalties of up to $6.1 million. The admission came in a quarterly report filed with the SEC, days after a federal judge kept alive a lawsuit over the gas turbinesLocal news coverage photo of the Southaven, Mississippi gas turbine power facility tied to the environmental violations. powering the same campus.
What the filing says
The Mississippi Department of Environmental Quality issued notices of violation in August to MZX Tech LLC, the SpaceXAI affiliate behind the company's Southaven power plant, alleging "disturbing construction activities at sites occurred prior to coverage under Mississippi's Large Construction Stormwater General Permit." MDEQ is seeking civil penalties of up to $25,000 per day, putting preliminary claimed exposure at approximately $6.1 million across the three sites, the filing said. MZX Tech told investors it is cooperating with the agency and is in discussions to resolve the matter through a "single agreed order."
The notices cover SpaceXAI's three Southaven properties: the data center, the adjacent gas power plant on Stanton Road, and a 51-acre parcel the company recently acquired in a land swap with the city, according to the DeSoto Times. The Memphis Commercial Appeal first reported the disclosure on Thursday.
A campus built at speed
Baxtel tracks the company under its former name, xAI, where the Southaven facility is listed as xAI: MACROHARDRR, an 810,000-square-foot warehouse conversion at 2400 Stateline Rd W that began operations in February and anchors a reported $20 billion investment in Mississippi. Power comes from the Stanton Road gas plant it shares with Colossus 2, the South Memphis site Baxtel lists as xAI: Macrohard. Baxtel power records show 100 MW operational at MACROHARDRR with roughly 295 MW under construction toward a total near 495 MW.
The buildout has turned Mississippi into a two-company data center market: Baxtel counts 48 facilities in the state, led by Amazon AWS with 23 sites and xAI with two. Across the state line, the Memphis market holds 16 facilities and about 1,045 MW, with xAI's 300 MW Colossus 1 the metro's largest site.
This week, Memphis councilors rejected a proposed 18-month data center moratorium, opting for a 135-day pause on new applications.
The turbine lawsuit
The stormwater case is the company's second environmental fight at the campus. In April, the NAACP sued SpaceXAI and MZX Tech in federal court over 27 methane gas turbines the group says ran at the Stanton Road plant without an air permit.
On Monday, U.S. District Judge Debra Brown rejected the Justice Department's bid to dismiss the Clean Air Act suit, leaving the government in the case only as an intervenor. The department had called the data center "a matter of paramount national security." "Congress intended to allow individuals to sue even when federal and state governments may, for whatever reason, decline to enforce the Clean Air Act," Brown wrote. Mississippi's permit board approved 41 permanent replacement turbines for the site in March, the Mississippi Free Press reported.
"We are pleased the Court saw through the Department of Justice's deeply flawed arguments, which aimed to block communities from holding xAI accountable for the harmful air pollution being pumped out by its illegal power plant," said Patrick Anderson, an attorney with the Southern Environmental Law Center, per Mississippi Today.
Why it matters
A $6.1 million penalty is small next to the $16.4 billion SpaceXAI spent on capital projects in the quarter, DCD reported from the same filing. The pattern is the story: the fastest private AI buildout in the country keeps breaking ground before its permits exist, first on air quality and now on stormwater, and the accumulated liability is now large enough to reach an SEC filing. Neither fight has slowed construction.
MZX Tech and MDEQ are negotiating a single agreed order. The NAACP case proceeds in federal court.
