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Commonwealth Edison Company, more commonly known as ComEd, is one of the country’s largest electricity utilities
Nicor Gas delivers natural gas to over 2 million customers.
North Shore Gas, formerly known as Peoples Gas
Peoples Gas provides residential and commercial natural gas delivery services to over 830,000 customers throughout Chicago.
Ameren Illinois provides delivery of natural gas to over 800,000 customers throughout central and southern Illinois.
NIPSCO Gas provides natural gas delivery services to over 786,000 customers located in the northern third of the state of Indiana.
Consumers Gas delivers natural gas to over 6 million customers in Michigan.
DTE Energy is a natural gas delivery company that provides services to over 1.2 million customers in the state of Michigan.
Columbia Gas of Ohio serves approximately 1.4 residential, commercial, and industrial businesses and is the largest natural gas utility company in the state.
Duke Energy is one of the largest energy holding companies in the nation.
FirstEnergy Corp. is a diversified energy company headquartered in Akron, Ohio.
FirstEnergy Corp. forms one of the nation’s largest investor-owned electric systems.
The Illuminating Company
The Illuminating Company is the third Ohio based electric utility company.