Wyoming to Consider Approval of Microsoft Data Centers’ Emissions Permit for Diesel Backup Generators

The Wyoming Department of Environmental Quality (DEQ) is currently reviewing Microsoft’s proposal to install 128 diesel-powered backup generators for its new data centers planned near Cheyenne, WyoFile reports.

The DEQ has announced that it will accept public comments on the matter through May 21 before making its final decision.

Microsoft, which operates several data centers around Cheyenne, has submitted a request to the DEQ for an emissions permit to install these generators as part of a larger expansion project. The generators are intended to serve as a backup power source in the event of an electricity interruption, according to Cheyenne Mayor Patrick Collins, who noted that the company’s contract with local energy provider Black Hills Energy will continue to provide primary power.

In addition to the generators, Microsoft’s proposal includes the construction of storage tanks capable of holding up to 1.8 million gallons of diesel fuel. The DEQ’s review of the application will consider potential emissions of pollutants such as nitrogen oxides (NOx), sulfur oxides (SOx), and volatile organic compounds (VOCs), which are sometimes linked to ozone and haze formation.

The public comment period provides an opportunity for individuals to voice their opinions on the proposal. However, the DEQ has indicated that unless an “aggrieved party” requests a public hearing, one will not be held. The department intends to approve the permit once it has reviewed the public feedback, as long as no significant concerns are raised.

Microsoft is planning to expand its data center operations further in the area, with four additional facilities proposed. Currently, Microsoft employs 85 individuals in its Cheyenne-area data centers, with plans to increase that number to 335 full-time positions by 2026. The company has committed to becoming carbon-negative by 2030, a pledge that remains a core part of its environmental strategy.

For more details about the permit application, members of the public can visit the Wyoming DEQ’s website and review the application using the provided identification code and permit number. Written comments can be sent to Nancy Vehr, Administrator of the Division of Air Quality, at the DEQ’s Cheyenne office.