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Data centers must follow clean air rules with their large generators, EPA says

  • On Thursday, the Environmental Protection Agency issued a final rule requiring data-center power generators to comply with the Clean Air Act and declared xAI in violation for operating large turbines without permits.
  • Developers classified trailer-mounted methane gas turbines as 'non-road engines' to avoid permits, prompting officials to review the rule in December 2024 amid hyperscale data centers' growth.
  • At the Memphis site, xAI operates 12 turbines but previously ran as many as 35 while only 15 were permitted, and Solaris Energy Infrastructure said promised pollution controls were not installed.
  • The rule requires large temporary gas turbines to meet federal Clean Air Act limits, making permitting a federal responsibility that could slow xAI expansion in Memphis, while environmental advocates including the NAACP said they would sue and urged local officials to act.
  • Last year, Residents of Boxtown, South Memphis testified about worsening smog and health impacts, while xAI, which raised $20 billion, faces investigations and SEI’s stock rose in recent months.
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27 Articles

CNBCCNBC
+3 Reposted by 3 other sources
Center

Elon Musk's xAI faces tougher road building out data centers after EPA rule update

An updated rule from the EPA closed a loophole that allowed xAI to build its Memphis data center quickly using air-polluting turbines as a power source.

·United States
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abc10 Sacramentoabc10 Sacramento
+14 Reposted by 14 other sources
Center

Data centers must follow clean air rules with their large generators, EPA says

Semitruck-sized power generators that data centers use must comply with Clean Air Act standards, officials ruled on Thursday.

·Sacramento, United States
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Krem2 News broke the news in Spokane, United States on Friday, January 16, 2026.
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