The Environmental Protection Agency faces more than 31 percent in cuts in the final White House fiscal 2018 budget proposal to be rolled out formally Tuesday, according to an advance summary floated by the administration Monday night.

The budget would cut the EPA’s funding by precisely 31.4 percent, or $2.6 billion, which would be the largest reduction for a large Cabinet-size agency. The total budget outlay would fall from $8.2 billion in fiscal 2017 to about $5.6 billion in fiscal 2018, according to a copy of the budget obtained by a national trade group representing state air pollution regulators.