Wisconsin data center boom will demand massive water, energy resources

Wisconsin is emerging as a significant hub for large-scale data centers, attracting major tech companies like Microsoft, Vantage Data Centers, Meta, Oracle, and OpenAI due to its abundant freshwater, cool climate, and relatively low land costs. This rapid expansion, particularly in areas like Port Washington, Mount Pleasant, and Beaver Dam, has sparked considerable concern among residents and environmental groups regarding the immense water and electricity demands of these facilities. Community meetings, such as one held in Port Washington, highlight local opposition to projects like Vantage's campus and associated transmission lines, with groups like the Protect Fredonia Coalition actively fighting proposed power infrastructure that could impact natural habitats. The primary environmental concerns revolve around the "water-energy nexus," where data centers' vast electricity consumption for cooling, largely sourced from fossil fuels via the MISO grid, creates a substantial indirect water footprint. Experts note a lack of transparency, as data centers often tap into local municipal water systems as customers, circumventing public notification or special permits for large water withdrawals. This makes it difficult to track total water usage, including the indirect consumption from power generation, which can occur hundreds of miles away. Specific projects, such as Microsoft's Mount Pleasant data center, expect to use millions of gallons of water annually, while Vantage's Port Washington facility projects 22,000 gallons per day. Although companies like Microsoft and Vantage are discussing sustainability goals and clean energy initiatives, critics argue that the rapid pace of data center deployment often outstrips the availability of clean energy. Concerns also extend to the potential use of "forever chemicals" (PFAS) in cooling systems and the strain on local water utilities, which are designed for longer planning horizons than the tech industry's rapid growth. Researchers and environmental advocates, including Melissa Scanlan from the Center for Water Policy at UW-Milwaukee and Hannah Richerson from Clean Wisconsin, are urging stronger regulations and a more comprehensive framework for evaluating data center proposals to ensure transparency and mitigate environmental impacts before further development proceeds.