Overview
- On Monday the U.S. Department of Justice moved to intervene in and asked a federal judge to dismiss the NAACP’s Clean Air Act case that seeks to stop dozens of natural‑gas turbines powering xAI’s Colossus 2 data center.
- A sworn Department of Defense declaration says xAI’s Grok Gov model has supported classified military operations, including use in recent strikes on Iran, and the DOJ argues disrupting power to Grok would threaten national, economic, and energy security.
- The NAACP and its lawyers say xAI began with 27 unpermitted trailer‑mounted turbines in April and expanded to about 57 by mid‑May, a growth that the Southern Environmental Law Center says sharply raised projected NOx, PM2.5 and formaldehyde emissions.
- The legal fight centers on whether trailer‑mounted turbines are temporary mobile units exempt from state permits or stationary sources subject to the Clean Air Act and whether executive enforcement discretion can block private citizen suits.
- xAI’s integration into SpaceX and recent IPO disclosures showing billions in planned purchases of mostly mobile gas turbines raise broader stakes for how courts treat environmental oversight of large AI data centers and the nearby communities that face health harms.