ComEd
Commonwealth Edison Company, perhaps better known as ComEd, is a unit of Chicago-based Exelon Corporation (NYSE: EXC). Exelon is one of the nation's largest electric utilities, with approximately 5.4 million customers. ComEd provides service to approximately 3.8 million customers across Northern Illinois, or 70 percent of the state's population.
ComEd's service territory borders Iroquois County to the south (roughly Interstate 80), the Wisconsin border to the north, the Iowa border to the west and the Indiana border to the east.