Trump has promised to slash U.S. environmental regulation as a way to promote oil drilling and mining. An administration official told Reuters the president would sign two executive actions on Tuesday to advance construction of the Keystone XL and Dakota Access pipelines, a sharp reversal from the Obama administration.
Trump's nominee to run the EPA, Oklahoma Attorney General Scott Pruitt, is awaiting Senate confirmation. Pruitt sued the EPA repeatedly as Oklahoma's top prosecutor.
Trump also has drawn heavily from the energy industry lobby and pro-drilling think tanks to build its landing team for the EPA, according to a list of the newly introduced 10-member team seen by Reuters on Monday.
An EPA spokesman did not immediately respond to a request for comment.