About DDOE DDOE serves as an agency within the Executive Branch of the DC government to consolidate the administration and oversight of environmental and energy programs, services, laws, and regulations. Under the authority of DC Law 16-51, the new DDOE was formed through a merger of the DC Government's Environmental Health Administration, the DC Energy Office, policy functions of the Tree Management Administration and policy functions of the Office of Recycling. The new DDOE is a one-stop-shop for programs and services that protect human health and the environment and address energy efficiency issues for all sectors of the city. DDOE programs are designed to facilitate cleaner air and water, green our neighborhoods and building space, and assist with the management of hazardous and toxic waste disposal. Additionally, DDOE conducts community and educational outreach to increase public awareness of environmental and energy related issues. District Department of the Environment Establishment Act of 2005*