Microsoft completes first Mount Pleasant AI data center, plans 15 more

Microsoft’s first AI‑focused data center in Mount Pleasant, Wisconsin, is slated to become fully operational later this year, marking the completion of the initial phase of a multi‑site campus that will eventually host more than 15 centers [1].

Construction finish and community concerns

The campus, broken ground in 2023, is the first of a series of “mega‑data centers” designed to train large AI models. While the building is nearly complete, nearby residents report a persistent high‑pitched hum that can be heard inside homes, raising questions about long‑term noise from cooling systems or generators [1]. Microsoft has said it is investigating the source and will provide an update, noting that construction complies with local noise ordinances (6 a.m.‑10 p.m., seven days a week) [1].

Workforce growth and broader rollout

As of May 2026, the Mount Pleasant site employs over 375 full‑time staff, including network, electrical, and plumbing specialists, and Microsoft expects the headcount to rise to roughly 500 once the facility is fully online [2]. The company also announced a second data center under construction, projected to generate about 3,000 construction jobs at peak activity [2]. In total, Microsoft plans to add more than 15 additional data centers across the Mount Pleasant area through at least 2028, positioning the campus as the “flagship supercomputer” in its portfolio [2].

Competitive and market implications

The Mount Pleasant campus adds significant AI‑training capacity to Microsoft’s cloud offering, directly competing with Amazon’s and Google’s expanding AI infrastructure. By scaling up both physical capacity and local employment, Microsoft signals a long‑term commitment to the Midwest as a strategic hub for AI workloads, potentially attracting AI‑focused startups and reinforcing its position in the enterprise cloud market.

What to watch

• Operational launch – Confirmation of the data center’s go‑live date later this year.
• Noise mitigation – Updates from Microsoft on the source of the hum and any remediation measures.
• Expansion milestones – Progress on the second center and the rollout schedule for the remaining 15 sites.

The completion of the first Mount Pleasant AI data center underscores Microsoft’s aggressive push to expand AI compute capacity in the United States, while community feedback highlights the need to balance rapid infrastructure growth with local quality‑of‑life considerations.