Enviros to Calif. regulators: Crack down on data center diesel

By Ariel Wittenberg | 04/23/2026 01:11 PM EDT

Nearly 20 environmental justice groups say current air pollution standards aren’t adequate for the region’s data center boom.

The San Francisco skyline is seen.

Sunlight illuminates homes in San Francisco, with the city's skyline in the background, on Oct. 17, 2025. Godofredo A. Vásquez/AP

Environmental justice groups are pushing California air regulators to crack down on data centers’ diesel generators.

The groups, lead by the Center for Biological Diversity, wrote in a petition to the Bay Area Air District on Wednesday that existing 20-year-old rules for diesel generators are outdated and unable to protect public health in the face of data centers’ growth.

“The scale and number of diesel generators has just grown tremendously, but the regulations haven’t changed to meet this moment,” center campaigner Meya Saenz Zagar said in an interview.

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The Bay Area Air District media manager Miranda Iglesias said the district “has received the petition and is reviewing the requests outlined by the coalition.”

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