"The U.S. Environmental Protection Agency has approved the state of Oklahoma’s request to administer environmental regulatory programs in Indian Country.
Republican Oklahoma Gov. Kevin Stitt, Cherokee, made the initial request to EPA Administrator Andrew Wheeler near the end of July, 13 days after the Supreme Court ruled in McGirt v. Oklahoma.
That decision stated Congress never explicitly disestablished the Muscogee (Creek) Nation Reservation and much of eastern Oklahoma remains Indian Country.
While the McGirt case dealt with criminal jurisdiction, it appears tribal and state governments believe the ramifications of the decision extend beyond that single area."