Virginia Fines Microsoft Data Center, Loudoun Pauses New Projects For One Year
Virginia's environmental regulator issued a nearly $2.5 million civil penalty to Microsoft's Leesburg data center, and on Tuesday, September 15, 2026, Loudoun County paused approvals for new data-center projects for one year.[1]
The civil penalty totaled nearly $2.5 million.[1] DEQ said the penalty stemmed from emissions that exceeded state limits during a June 2025 substation failure that forced 62 emergency engines to run for seven days.[1] Microsoft agreed to invest $2.4 million in an environmental project to expand air-quality monitoring in Loudoun County, and the state plans to deploy dozens of air-quality sensors in its most data-center-heavy areas.[1] The Loudoun County Board of Supervisors voted 7-1 with one abstention to pause approval of new data-center applications for one year, effective September 15, while it reviews tighter standards and locations.[1]
During the June 2025 substation failure, backup emergency engines ran for seven days and produced the emissions regulators flagged.[1] That incident prompted DEQ enforcement and a negotiated environmental project, and it intensified concerns among residents and supervisors about noise and air quality near clusters of data centers.[1]
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📌 Key Facts
- Virginia’s Department of Environmental Quality issued a nearly $2.5 million civil penalty against Microsoft’s Leesburg data center for exceeding emissions limits during a June 2025 substation failure that forced 62 emergency engines to run for seven days.
- Microsoft agreed to invest $2.4 million in an environmental project to expand air-quality monitoring in Loudoun County, while the state plans to deploy dozens of air-quality sensors in its most data-center-heavy areas.
- On Tuesday, September 15, 2026, the Loudoun County Board of Supervisors voted 7-1 with one abstention to pause approval of new data-center applications for one year, effective September 15, while it reviews tighter standards and locations.
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