Microsoft’s artificial intelligence data centre in Wisconsin has become the subject of a class-action lawsuit after residents of Mount Pleasant and the neighbouring village of Sturtevant alleged that continuous mechanical noise from the facility has disrupted their sleep, health and quality of life.
The data centre, developed at an estimated cost of $7.3 billion, or about ₹62,000 crore, was introduced earlier this year by Microsoft Chief Executive Officer Satya Nadella as one of the world’s most powerful AI computing facilities. The company has said the campus connects hundreds of thousands of high-performance AI chips into a single computing cluster to support large-scale artificial intelligence workloads.
Residents Allege Round-the-Clock Noise
Residents living near the facility claim that the data centre has created persistent noise pollution. The lawsuit alleges that diesel generators, HVAC systems, cooling towers, air-handling units and condenser fans generate excessive noise throughout the day and night.
The plaintiffs have also alleged that Microsoft failed to install adequate acoustic barriers or other effective noise-control systems to prevent disturbance in nearby residential areas.
One complainant, Amy Cimbalnik, told local media that the constant humming resembled the sound of a freight train engine operating continuously near homes. Residents said they initially struggled to identify the source of the noise before finding that it was coming from Microsoft’s AI campus.
Microsoft Says Mitigation Steps Taken
Residents have claimed that the construction phase also created heavy noise from sunrise until late evening for nearly two years. They allege that the operational facility now produces an uninterrupted mechanical hum, affecting sleep and daily life.
Microsoft has acknowledged the lawsuit and said it remains committed to being a responsible corporate neighbour in communities where it builds and operates data centres. The company said it investigated the complaints and introduced several technical measures to reduce noise levels.
In updates published on its official blog, Microsoft said engineers identified a tonal humming sound from high-speed cooling fans in April and later made engineering changes to mitigate the issue. The company said independent monitoring and feedback from several neighbours indicated that the measures had substantially resolved the problem.
Lawsuit Raises Wider AI Infrastructure Concerns
Officials from the Village of Mount Pleasant said they had not received fresh complaints since Microsoft introduced the modifications in mid-April. They added that local authorities remain prepared to investigate and respond if further complaints are received.
The plaintiffs, however, maintain that the issue has not been fully resolved. The class-action lawsuit, filed on July 1, 2026, suggests that several residents continue to face serious noise-related disturbance.
The case comes as artificial intelligence and cloud computing infrastructure expands worldwide, increasing scrutiny of large data centres over their environmental and community impact. Microsoft’s reported plan to develop as many as 15 data centres in the Mount Pleasant area has further raised concerns among local residents.
