WASHINGTON — The Biden administration Wednesday increased the amount of biofuels that must be blended into the nation’s fuel supplies over the next three years, but held production totals steady for corn-based ethanol, disappointing the biofuel industry and farm advocates.

A plan finalized by the Environmental Protection Agency sets biofuel blending volumes at 20.94 billion gallons in 2023, 21.54 billion gallons in 2024 and 22.33 billion gallons in 2025. The totals under the federal Renewable Fuel Standard are higher than levels set for 2022 and earlier years, but include just 15 billion gallons of corn-based ethanol in all three years.

Most gasoline sold in the U.S. contains 10% ethanol.