Citizen Suit Enforcement/Clean Air Act: NAACP Challenges Southaven, Mississippi (Colossus 2) Data Center
April 17, 2026
By:
Walter G. Wright
Category:
Arkansas Environmental, Energy, and Water Law
Arkansas Environmental, Energy, and Water Law
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The National Association for the Advancement of Colored People (“NAACP”) filed an April 14th Complaint in the United States District Court for the Northern District of Mississippi against xAI Corp. and MZX Tech LLC (collectively, “MZX”) alleging violations of the Clean Air Act.
The complaint alleges that between August and December 2025 MZX installed and began operating 27 gas turbines (Colossus 2 data center) in Southaven, Mississippi.
The data center is stated to power the company’s chatbot “Grok.” It is alleged to have begun operating without an air permit.
Air emissions from the data center are alleged to include:
- Nitrogen oxides
- Formaldehyde
The Complaint further alleges that the 27 turbines have the potential to emit over 1,700 tons of NOx.
The NAACP asks that the United States District Court determine that MZX has violated the Clean Air Act and to require it to:
- Cease operating unpermitted turbines.
- Install best available control technology.
- Pay financial penalties.
A copy of the Complaint can be found here.
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