Microsoft Fairwater Wisconsin (Mount Pleasant)
AI data center in Mount Pleasant, Wisconsin, operated by Microsoft.
Microsoft's first Fairwater AI datacenter in Mount Pleasant, Wisconsin, built on Nvidia GB200 racks with closed-loop liquid cooling. Building 1 went live in April 2026 and a nine-building expansion is graded.
Power: what each source says
Building 1 operational 2026-04-16 (Satya Nadella on X). Epoch AI estimates 369 MW IT as of 2026-05-15 and ~2.26 GW IT / 2.7 GW facility after buildings 3-11 (~2028, estimate). Microsoft has not published a campus MW figure.
Figures labelled Epoch AI are estimates from satellite imagery, permits and filings. Company figures come from the operator, owner or its filings. IT power is what the servers draw; in Epoch AI’s figures for these campuses it runs about 15–35% below total facility power.
Tenants
Part reported Microsoft; OpenAI (likely, per Epoch AI)
“Reported” means a press outlet or Epoch AI named the tenant and neither the operator nor the tenant has confirmed it. The outlet is named in brackets and listed under sources.
Campus facts
- Operator
- Microsoft 1
- Owner / developer
- Microsoft 1
- City
- Mount Pleasant 1
- State / region
- Wisconsin 1
- Country
- United States 1
- First power
- 2026-04 1
- Chips
- NVIDIA GB200 NVL72 ('hundreds of thousands' of GB200s, Microsoft) 1
- GPUs / accelerators
- Not published
- Cooling
- liquid 1
- Power source
- grid (We Energies) 1
- Coordinates
- 42.72° N, 87.88° W (town level)
- Verified
Sources
- Microsoft: Inside the world's most powerful AI datacenter (2025-09-18) accessed 2026-11-09
- Satya Nadella on X: Fairwater Wisconsin operational (2026-04) accessed 2026-11-09
- Village of Mount Pleasant agenda: 9-building plan (2026-01-21) accessed 2026-11-09
- Epoch AI, AI data centers dataset (CC-BY 4.0, updated 2026-11-06) (licence: CC BY 4.0) accessed 2026-11-09