Potomac Electric Power Co
Potomac Electric Power Company engages in the purchase and regulated retail sale of electricity, and the provision of electricity distribution and transmission services in the District of Columbia and various portions of Prince George’s County and Montgomery County in Maryland. As of December 31, 2017, its electric distribution system included 4,105 circuit miles of overhead lines, and 6,844 circuit miles of underground lines. The company was incorporated in 1896 and is based in Washington, the District of Columbia. Potomac Electric Power Company is a subsidiary of Pepco Holdings LLC.