Project record, phase
Microsoft Fairwater 1 (Mount Pleasant, Wisconsin)
First Microsoft datacenter facility at Mount Pleasant, announced in May 2024. Equipment came online with startup activities in April 2026 and Microsoft reported the facility fully operational on 23 June 2026, with nearly 550 full-time staff. The site has three buildings with 1.2 million sq ft under roof and uses closed-loop liquid cooling for most capacity.
Part of Microsoft Mount Pleasant campus (Fairwater, Wisconsin). Capacity roll-ups count the parent figure and do not add this record again.
Reported figures
| Figure | What it measures | Delivery state | Scope and date | Used in totals | Source |
|---|---|---|---|---|---|
| 1,200,000 sq ft Official source | Floor or land area Floor area under roof. Source wording: "three massive buildings with a combined 1.2 million square feet under roofs" | Operating Stage stated in source: Operating | phase 18 Sept 2025 | No. Area figures describe different things (site, floor or data hall area). Shown per record, never summed. | blogs.microsoft.com (opens in a new tab) |
Each figure is shown as reported, with its own definition. IT, facility, grid and thermal figures are never added together. Capacity definitions.
Cooling
Closed-loop direct liquid cooling for over 90% of capacity with fin coolers and chiller plant. Air cooling for remaining servers. blogs.microsoft.com (opens in a new tab)
What changed
- 23 Jun 2026 Microsoft's first Fairwater facility in Wisconsin is fully operational: Microsoft said the first Mount Pleasant facility was fully operational on 23 June 2026, with a second facility due in 2028. The site uses closed-loop liquid cooling for over 90% of capacity. Related: Microsoft, Microsoft second Mount Pleasant facility (Wisconsin), Microsoft Mount Pleasant campus (Fairwater, Wisconsin), United States. news.microsoft.com (opens in a new tab)blogs.microsoft.com (opens in a new tab)
Notes
Grid status energised inferred from reported operation.
Sources (2), last checked 18 Oct 2026
- Microsoft completes construction on first datacenter facility in Mount Pleasant, Wisconsin (opens in a new tab), Microsoft Source, published 23 Jun 2026, accessed 18 Oct 2026
- Inside the world's most powerful AI datacenter (opens in a new tab), Microsoft (Official Microsoft Blog), published 18 Sept 2025, accessed 18 Oct 2026
Last checked 18 Oct 2026 by CoolPower Index research (automated, sourced). Report a correction.