ComEd Proposes $3.1 Billion Grid Expansion for Data Centers
The utility plans major system upgrades to support 30 new large-load data center projects across Illinois.
Updated on Oct. 22, 2026 in Data Centers
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ComEd aims to invest $3.1 billion in grid infrastructure to accommodate 30 large-load data centers requiring at least 50 megawatts each. The expansion includes significant work on both new and existing transmission and distribution systems.
Why it matters
Utility officials say these grid improvements are essential to meet the massive power demands of regional data centers, while consumer advocates worry about the financial risk to households if projects are abandoned.
The $3.1 billion project budget includes $1.4 billion for new transmission work, $1.5 billion for distribution improvements, and $189 million for existing infrastructure upgrades. Currently, each of the 30 planned sites requires a minimum of 50 megawatts of power.
The players
ComEd
ComEd is an electric utility company that serves millions of customers across northern Illinois.
Citizens Utility Board
The Citizens Utility Board is a nonprofit consumer watchdog organization that advocates for lower utility rates and reliable service.
Illinois Commerce Commission
The Illinois Commerce Commission is the regulatory agency responsible for overseeing utility companies in the state.
The details
ComEd is utilizing Transmission Security Agreements to secure necessary funding while simultaneously seeking regulatory permission to throttle service to these sites during times of grid stress. This effort follows a period where the utility's electricity supply price has climbed 50% compared to levels recorded two years ago.
Timeline
1983: The Citizens Utility Board was created by the state legislature.
2021: Construction of new data centers began in Illinois.
Summer 2026: Expert testimony was filed with the Illinois Commerce Commission.
November-December 2026: The state may consider the POWER Act during the veto session.
2031: This marks the end of the expected timeframe for these data centers to come online.
The Tech Race
The legislative debate surrounding the POWER Act highlights the tension between the rapid expansion of energy-intensive data infrastructure and the protection of residential ratepayer interests. This effort signals a move toward shifting the financial burden of grid expansion away from general utility customers.
Local residents face potential bill increases if these large-scale data center projects are abandoned after significant utility investment. Meanwhile, the utility is seeking the ability to throttle service to data centers, which may help manage grid stress during periods of high demand.
The takeaway
The rapid growth of the digital infrastructure sector continues to challenge local energy grids and their existing rate structures. Residents should monitor the upcoming legislative sessions as state leaders weigh who should bear the multi-billion dollar cost of these massive grid upgrades.
What happens next
The Illinois legislature is expected to consider the POWER Act during the upcoming veto session scheduled for November and December 2026.
Further reading
Learn more about the state's expanding infrastructure at Illinois Data Centers.
Source note: This article includes information reported by Illinois Newsroom.
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