Illinois Faces Water Crisis as Data Centers Drain Millions of Gallons Daily

Data centres in Illinois are consuming millions of gallons of water each day, raising concerns about the state’s long-term supply. Most of these facilities rely on municipal drinking water for cooling, putting pressure on resources. Experts now warn that without action, future shortages could become a serious risk. The scale of water use by data centres has grown rapidly. In 2023, U.S. facilities accounted for 17.4 billion gallons, with projections reaching 72.6 billion gallons by 2028. A single large centre can use up to 5 million gallons in one day—comparable to a medium-sized town’s consumption.

Unlike other industrial uses, water for cooling is not returned to the system. This permanent loss adds strain to Lake Michigan, the primary source for the Chicago area. While wastewater treatment plants can supply some centres, most still depend on drinking water. The Illinois Department of Natural Resources has so far declined to comment on the issue. Meanwhile, planners stress the need for better management to secure the region’s water future.

With demand from data centres set to rise, Illinois faces growing pressure on its water resources. Effective planning will be essential to balance industrial needs with sustainable supply. Without changes, the state risks facing shortages in the years ahead.