{"id":"824d3b90-2903-4335-9716-8f73fb969f7a","slug":"microsoft-fairwater-wisconsin","name":"Microsoft Fairwater Data Center (Mount Pleasant)","aliases":[],"locationId":"1f1633ba-b8ba-4d54-ae81-4666aa6420c5","lat":42.6763,"lng":-87.9001,"locationPrecision":"exact","landStatus":"former_industrial","lifecycleState":"partially_energized","powerSourceMix":"grid","interconnectionQueueStatus":null,"interconnectionQueueId":null,"expectedEnergizationDate":null,"dedicatedSubstation":null,"gridOperator":"MISO","waterSourceNotes":"Closed-loop liquid cooling filled once at construction with no ongoing water draw and no evaporation across about 90% of capacity; the remaining ~10% uses outdoor-air cooling and taps water only during peak summer heat. Microsoft compares annual water use to a single restaurant.","servingUtility":null,"acreage":null,"totalBuildingSqft":null,"streetAddress":null,"notes":"Microsoft completed and energized the first Fairwater facility (Building 1) in Mount Pleasant in June 2026 (operational since April 2026), on the former Foxconn site, calling it one of the world's most powerful AI supercomputers. Phase 1 filed a hard load of 450 MW with the Public Service Commission of Wisconsin; roughly 369 MW of IT power / ~446k H100-equivalents is operational today, with a second facility under construction targeting 2028 and campus IT power projected to exceed 2.2 GW. Power is entirely grid-supplied by We Energies, which is building ~1.2 GW of new gas generation (Oak Creek + Paris) justified partly on this load.","keyFacts":[{"label":"Operator","value":"Microsoft ([Microsoft Source, Jun 23 2026](https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/))","sourceUrl":"https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/"},{"label":"Campus footprint (announced)","value":"About 315 acres in Mount Pleasant, Wisconsin; three buildings totaling about 1.2 million sq ft under roof ([Microsoft Blog, Sep 18 2025](https://blogs.microsoft.com/blog/2025/09/18/inside-the-worlds-most-powerful-ai-datacenter/))","sourceUrl":"https://blogs.microsoft.com/blog/2025/09/18/inside-the-worlds-most-powerful-ai-datacenter/"},{"label":"Lifecycle / first facility","value":"First Mount Pleasant facility completed and fully operational as of Jun 23 2026 after bringing equipment online and startup activities in April; announced May 2024 and completed ahead of schedule ([Microsoft Source](https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/))","sourceUrl":"https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/"},{"label":"Second facility (targeted)","value":"Adjacent second facility under construction (foundations, steel, underground utilities); scheduled completion 2028 ([Microsoft Source](https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/))","sourceUrl":"https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/"},{"label":"AI hardware (company-stated)","value":"Campus described as a single flat-networked AI supercomputer of NVIDIA GB200 servers; Azure claimed first cloud to bring GB200 online at rack and datacenter scale ([Microsoft Blog](https://blogs.microsoft.com/blog/2025/09/18/inside-the-worlds-most-powerful-ai-datacenter/))","sourceUrl":"https://blogs.microsoft.com/blog/2025/09/18/inside-the-worlds-most-powerful-ai-datacenter/"},{"label":"Cooling (company-stated)","value":"Closed-loop liquid cooling with facility-scale water-cooled chiller plant; company says water is filled once and recirculated with no evaporation losses for that loop ([Microsoft Blog](https://blogs.microsoft.com/blog/2025/09/18/inside-the-worlds-most-powerful-ai-datacenter/))","sourceUrl":"https://blogs.microsoft.com/blog/2025/09/18/inside-the-worlds-most-powerful-ai-datacenter/"},{"label":"Jobs / local spend (company-stated)","value":"Nearly 550 full-time employees on-site at first facility; ~800 FTE expected in the Village when the second facility is fully operational; Microsoft estimates $4.7B local hyperscale construction spend in Wisconsin between 2024 and 2028 ([Microsoft Source](https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/))","sourceUrl":"https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/"},{"label":"IT MW (HOLD)","value":"Microsoft primary pages cited here do not publish a hard IT-MW figure for Fairwater Wisconsin. Registry notes reference secondary estimates (e.g. Epoch / PSC filings); those MW numbers are held pending a Microsoft primary disclosure."}],"reviewStatus":"reviewed","sources":[{"url":"https://news.microsoft.com/source/2026/06/23/microsoft-completes-construction-on-first-datacenter-facility-in-mount-pleasant-wisconsin/","title":"Microsoft completes construction on first datacenter facility in Mount Pleasant, Wisconsin","sourceName":"Microsoft Source"},{"url":"https://epoch.ai/data/ai-data-centers/directory/microsoft-fairwater-wisconsin","title":"Microsoft Fairwater Wisconsin | AI Data Centers","sourceName":"Epoch AI"},{"url":"https://www.utilitydive.com/news/wisconsin-gas-plant-proposals-test-state-review-process/825885/","title":"Wisconsin gas plant proposals test state review process","sourceName":"Utility Dive"},{"url":"https://blogs.microsoft.com/blog/2025/09/18/inside-the-worlds-most-powerful-ai-datacenter/","title":"Inside the world's most powerful AI datacenter","sourceName":"Microsoft"}],"reviewNote":null,"createdAt":"2026-08-17T18:11:29.591Z","updatedAt":"2026-09-28T04:25:33.052Z","location":{"id":"1f1633ba-b8ba-4d54-ae81-4666aa6420c5","name":"Mount Pleasant","slug":"mount-pleasant-wisconsin","kind":"city","parentLocationId":"977b5374-34d6-4ea6-b3b1-de69931acac7","region":"Wisconsin","lat":42.75,"lng":-87.94,"reviewStatus":"reviewed","aliases":[],"collisionRisk":"high","reviewNote":null,"createdAt":"2026-08-17T18:11:29.206Z","updatedAt":"2026-08-21T03:20:12.226Z"},"parties":[{"id":"3aa0cf72-a8b2-4214-a0c7-0a15a3386086","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","companyId":null,"externalName":"Microsoft / OpenAI","role":"tenant","structureNotes":"Self-tenant AI supercompute (Azure).","createdAt":"2026-08-17T18:11:34.779Z","company":null},{"id":"a5f885a8-b6a0-4c72-8709-ddb69a3882bb","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","companyId":null,"externalName":"NVIDIA","role":"chip_supplier","structureNotes":"GB200/B200-class GPUs (Epoch cites B200).","createdAt":"2026-08-17T18:11:35.529Z","company":null},{"id":"0dbc0ba8-d3a3-4f44-8064-3ddffef36b83","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","companyId":null,"externalName":"We Energies","role":"utility","structureNotes":"Regulated monopoly; sole grid power supplier, building new gas generation.","createdAt":"2026-08-17T18:11:36.292Z","company":null},{"id":"919d7ebf-18dc-46cf-a30d-b748355ccbbe","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","companyId":null,"externalName":"MISO","role":"grid_operator","structureNotes":"We Energies operates within MISO.","createdAt":"2026-08-17T18:11:37.046Z","company":null},{"id":"6be0d1b4-4415-4d04-a56e-5bfc4370c309","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","companyId":"b8670b58-67f2-4b87-9b46-9e16588dc1e6","externalName":"Microsoft","role":"developer","structureNotes":"Owner-operator; Fairwater flagship AI datacenter on former Foxconn land.","createdAt":"2026-08-17T18:11:34.026Z","company":{"id":"b8670b58-67f2-4b87-9b46-9e16588dc1e6","name":"Microsoft","slug":"microsoft"}}],"capacityClaims":[{"id":"d78823b9-53f5-4e65-9d8f-4133d15085ad","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","series":"announced","valueGw":0.45,"asOf":"2025-01-01T00:00:00.000Z","sourceUrl":"https://www.utilitydive.com/news/wisconsin-gas-plant-proposals-test-state-review-process/825885/","sourceType":"utility_filing","evidenceTier":"reported","supersedesId":null,"note":"Phase 1 hard load of 450 MW filed with the Public Service Commission of Wisconsin (Jan 2025).","createdAt":"2026-08-17T18:11:30.311Z"},{"id":"f2a7229e-f471-4c76-a50c-89fe73d7ef4f","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","series":"energized","valueGw":0.369,"asOf":"2026-04-16T00:00:00.000Z","sourceUrl":"https://epoch.ai/data/ai-data-centers/directory/microsoft-fairwater-wisconsin","sourceType":"journalist_report","evidenceTier":"reported","supersedesId":null,"note":"~369 MW IT power / ~446k H100-equivalents operational (Building 1 online since Apr 2026, construction completed June 2026).","createdAt":"2026-08-17T18:11:31.134Z"},{"id":"27714a1c-9783-4472-9dd6-3645f6b60b55","dataCenterId":"824d3b90-2903-4335-9716-8f73fb969f7a","series":"under_construction","valueGw":2.26,"asOf":"2028-05-13T00:00:00.000Z","sourceUrl":"https://epoch.ai/data/ai-data-centers/directory/microsoft-fairwater-wisconsin","sourceType":"journalist_report","evidenceTier":"claimed","supersedesId":null,"note":"Projected campus IT power ~2,263 MW by Q2 2028 as additional buildings complete; 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