Commonwealth Edison Company


About Commonwealth Edison Company

Commonwealth Edison Company (ComEd) provides electric service to more than ​​4​ million customers across northern Illinois.


More Info on Commonwealth Edison Company

Commonwealth Edison Company (ComEd) provides electric service to more than ​​4​ million customers across northern Illinois, or 70 percent of the state’s population. ComEd is a subsidiary of Exelon Corporation (NASDAQ: EXC), the nation’s leading competitive energy supplier.

Articles & News

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Transmission Reliability

Northern Illinois Families and Businesses Experienced Record Electric Reliability in 2022

Jan. 30, 2023
Since grid improvements began in 2011, overall reliability has improved more than 80%.
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New ComEd Substation Brings Science to Life at Argonne National Laboratory

July 5, 2022
The 138-kV substation is the latest collaboration between ComEd and Argonne to ensure reliable energy for critical research.
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Disaster Response

Power Restored to Nearly 80,000 ComEd Customers Following Severe Storms

June 14, 2022
The storm disrupted service to more than 125,000 customers.
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Smart Utility

ComEd Takes Steps to Implement Approved Expansion of Energy Efficiency Programs

May 31, 2022
State’s new energy law creates more customer savings, including through electrification.
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Disaster Response

ComEd, Argonne Team Up to Study the Impact of Climate Change on the Power Grid

May 26, 2022
First Study launched in concert with EPRIs climate READi power initiative.
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ComEd Awards US$280,000 in College Scholarships to 56 Illinois Students Pursuing Futures in Energy

May 20, 2022
Future of Energy Scholarship Fund launched this year to remove financial barriers, boost diversity and inclusion in STEM and energy careers.

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