Mississippi Hits SpaceXAI With Water Violations Over Southaven Build

Mississippi environmental regulators have detailed penalties against SpaceXAI for starting construction on its Southaven data center complex without required water pollution permits, with the company itself warning investors that fines could reach $6.1 million.

The Mississippi Department of Environmental Quality released the details this week. SpaceXAI first disclosed the potential fines to investors two weeks ago in an Oct. 22 filing with the Securities and Exchange Commission, estimating the exposure at as much as $6.1 million.

What did the inspectors find?

State law requires companies to obtain permits before construction begins, so that pollution from building sites does not reach public bodies of water. Without those protections, rain can carry debris and chemicals off a site and into natural habitats, drinking water systems and recreational areas, federal regulators at the EPA warn.

Earlier this year, SpaceXAI — through its subsidiary, MZX Tech LLC — asked MDEQ for permits covering construction within its growing Southaven footprint. That footprint includes a power plant and land for a $20 billion data center facility called MACROHARDRR.

During a July meeting between MDEQ and MZX Tech, "it became apparent" the company had already begun construction on the land, affecting roughly 30 acres, according to MDEQ records. A day after the meeting, on July 16, MDEQ staff visited Southaven and confirmed the violations.

The agency sent two notices of violation to MZX Tech on Aug. 10. Both, MDEQ wrote, "will be subject to the maximum statutory penalty" of $25,000 for each day construction continues without the needed permits.

The company is pushing for a negotiated settlement. "The Company is cooperating with MDEQ and is in discussions to resolve the matters through a single agreed order," SpaceXAI wrote in its SEC filing.

Where does the $6.1 million figure come from?

That remains unclear. The $25,000-per-day penalty would imply, at maximum, roughly 244 days of violation — several months of unpermitted work. MDEQ declined to confirm whether the $6.1 million figure is accurate, citing its policy of not commenting on pending enforcement matters.

The inspection reports add texture to the allegations. At one MZX Tech property — a former Southaven training facility that neighbors Horn Lake Creek — staff found that "no steps have been taken to protect stormwater infrastructure at the site," along with a lack of protection against "fugitive dust emissions."

At the 2400 Stateline Road property, the site for MACROHARDRR, inspectors found "no controls around storm inlets." They noted that construction appeared to have started around the beginning of 2026, while the property's last construction stormwater permit expired in 2023.

A separate fight over gas turbines

The water violations are not the only regulatory headache for the Elon Musk-owned company in Mississippi. Last week, U.S. District Court Judge Debra Brown found that MDEQ had misinterpreted federal clean air statutes when it allowed SpaceXAI to run 69 temporary natural gas turbines without a permit.

Brown included the opinion in her ruling against a motion to dismiss the NAACP's April lawsuit against the data center company. MDEQ had relied on a federal Clean Air Act exemption intended for mobile generators. SpaceXAI's turbines, Brown reasoned, clearly did not meet that criteria — a distinction central to the NAACP's argument.

The agency responded to the order in a statement on Wednesday. "MDEQ is aware of the Court's order and takes seriously all opinions by a federal court," agency spokesperson Jan Schaefer said. "Nonetheless, MDEQ is not a party to that case and the order is not binding upon the agency."

Schaefer added that the litigation is ongoing and subject to appeal, and said: "MDEQ always seeks to make sure our policies are in compliance with state and federal law and will do the same here once that litigation concludes."

The agency had told SpaceXAI last year that the generators could run unpermitted because the units are "affixed to a portable unit (i.e., a flatbed trailer)" and therefore counted as mobile. Brown disagreed, pointing to the size of the generators and the fact they are not "self-propelled or intended to be propelled" while operating.

For now, the water penalty talks and the turbine litigation run on separate tracks. SpaceXAI's cooperation with MDEQ on a single agreed order suggests a financial settlement could land first, while the NAACP case — and any appeal — will take longer to resolve.