Alabama Department of Mental Health was created in 1965.
Alabama Department of Homeland Security was created in 2003.
Alabama Department of Public Health was created in 1875.
Alabama Department of Public Safety was created in 1935.
Environmental Protection Department was created in 1986.
Department of Management Studies was created in 1968.
New York State Department of Environmental Conservation was created in 1970.
New York City Department of Environmental Protection Police was created in 1906.
New York State Department of Environmental Conservation Police was created in 1880.
Pennsylvania Department of Environmental Protection was created in 1995.
Veolia Environmental Services was created in 2005.
The third department created by Congress was the Department of War, established in 1789. It was responsible for the management of military affairs and the defense of the nation. The first two departments were the Department of State and the Department of the Treasury.