WASHINGTON—The U.S. Environmental Protection Agency said it is deferring for now a regulation that requires oil refineries to blend biofuels into the nation’s gasoline supply.

The EPA intends instead to take final action on the rule, the renewable fuel standard, next year, an agency spokeswoman said in an emailed statement Friday. The announcement, which comes after three months of review at the White House, is the latest in multiple delays at the agency in proposing annual biofuels levels for the standard.

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