Consolidated Edison, Inc., through its subsidiaries, engages in the regulated electric, gas, and steam delivery businesses in the United States. It offers electric services to approximately 3.7 million customers in New York City and Westchester County; gas to approximately 1.1 million customers in Manhattan, the Bronx, parts of Queens, and Westchester County; and steam to approximately 1,530 customers in parts of Manhattan. The company also supplies electricity to approximately 0.3 million customers in southeastern New York and northern New Jersey; and gas to approximately 0.2 million customers in southeastern New York. In addition, it operates 545 circuit miles of transmission lines; 15 transmission substations; 63 distribution substations; 90,051 in-service line transformers; 3,788 pole miles of overhead distribution lines; and 2,314 miles of underground distribution lines, as well as 4,363 miles of mains and 380,870 service lines for natural gas distribution. Further, the company invests in electric and gas transmission projects. It primarily sells electricity to industrial, commercial, residential, and government customers. Consolidated Edison, Inc. was founded in 1823 and is based in New York, New York.