PECO Energy Company is one of the largest electricity and natural gas utility businesses in Pennsylvania that operates and maintains a network of more than 550 electric substations. The company serves the needs of over 1.5 million customers in southeastern Pennsylvania. It offers services for customers in the electricity and natural gas industries. PECO Energy Company has a staff of nearly 2,500 employees. The company has more than 21,000 miles of distribution and transmission lines and maintains over 25 natural gas gate stations. It has archived ISO 14001 certification. In addition, PECO Energy Company is a subsidiary of Exelon Corporation.