DOJ moves to dismiss Clean Air Act lawsuit against Musk's xAI data center, citing national security

On June 16, 2026, the U.S. Department of Justice moved to dismiss a Clean Air Act lawsuit filed by the NAACP and environmental groups against Elon Musk's xAI data center facility in Memphis, Tennessee. The DOJ argued in court filings that allowing the case to proceed would endanger national security, citing classified information related to the facility's operations and strategic importance to U.S. defense capabilities.

The xAI data center has been operating diesel generators without obtaining required air quality permits from the Tennessee Department of Environment and Conservation. Local environmental justice communities near the facility have filed complaints about diesel emissions and air quality degradation. The Clean Air Act requires major industrial facilities to obtain and maintain valid air permits; violations can result in civil enforcement actions and penalties.

By invoking national security, the DOJ positioned itself against the NAACP and environmental groups seeking to enforce the statute. The motion to dismiss asserts that national security concerns override the normal application and enforcement of the Clean Air Act in this instance. This selective invocation of national security to shield a politically-connected company from environmental accountability demonstrates how emergency powers can be weaponized to protect allies from legal consequences that would apply to other industrial operators.