The EPA is ran by an administrator appointed directly by the president of the United States and although it is not technically a cabinet position, the appointed administrator of the EPA is given the same level of rank and authority as a cabinet member would have. Geographically, the EPA is divided into 10 different regions that cover each of the states across the country.
Internally, the EPA consists of 13 distinct offices including:
Office of Administration and Resources
Office of Air and Radiation
Office of Enforcement and Compliance Assurance
Office of Environmental Information
Office of Environmental Justice
Office of the Chief Financial Officer
Office of General Counsel
Office of Inspector General
Office of International Affairs
Office of Prevention, Pesticides, and Toxic Substances
Office of Research and Development
Office of Solid Waste and Emergency Response
Office of Water