PORT WASHINGTON, Wis. —Port Washington neighbors are raising questions about water use and environmental oversight surrounding the $15 billion "Lighthouse" AI data center campus being developed by Vantage in what was once rural farmland. "I think there's a lot of confusion," said Port Washington neighbor Anna Seidl. Signage inside a Vantage facility in Virginia says the company's goal is to build "sustainable data centers that minimize environmental impacts." The website details for its Lighthouse Port Washington project include information about power, cooling, and sustainability. Environmental groups are suing the Wisconsin Department of Natural Resources, claiming environmental impact statements for the Port Washington site were not completed.