Best utilities companies in District of Columbia

The District of Columbia Water and Sewer Authority provides drinking water and wastewater services to residents, visitors and employees of the District and parts of the surrounding area. George S. Hawkins, General Manager

Potomac Electric Power Company primarily 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, 2016, its electric distribution system includes 12,963 circuit miles of overhead lines, and 9,290 circuit miles of underground lines. The company was incorporated in 1896 and is based in Washington, District of Columbia. Potomac Electric Power Company is a subsidiary of Pepco Holdings LLC.

The Edison Electric Institute (EEI) is the association of U.S. Shareholder-Owned Electric Companies. EEI's members serve 95 percent of the ultimate customers in the shareholder-owned segment of the industry, and represent approximately 70 percent of the U.S. electric power industry.

WGL Holdings, Inc. is a public utility holding company serving the Washington, D.C. metropolitan region. Washington Gas, our leading subsidiary, has provided safe, reliable natural gas service to customers in the D.C. area for over 160 years and, today, serves more than one million customers in the District of Columbia, Maryland and Virginia. Our unregulated subsidiaries provide energy-related services to residential and commercial customers, including government organizations. Whether we are distributing clean natural gas safely to a customer's home, providing electric power through renewable wind energy, or installing energy-efficient systems for the federal government, our vision is consistent and clear throughout our business: to be the preferred source of clean and efficient energy solutions.

The Office of Surface Mining Reclamation and Enforcement is a branch of the United States Department of the Interior.

Barry's Security Services, Inc. is primarily engaged in providing detective, guard, and armored car services.