Congress bill would ease summer rules for 10% to 15% ethanol gasoline and return some refinery credits

E15 (10–15% ethanol) volatility rule changes take effect after the bill becomes law

Fuel suppliers and gas stations may be able to sell E15 more broadly during the high-ozone season, which can change what options you see at the pump.

EPA processes state notifications under the updated 10–15% ethanol standard

States that send the required notice after enactment would be handled under the updated rules, which can affect what fuel blends are allowed in those areas during summer months.

Older state notifications (submitted before enactment) shift to the new standard for 10–15% ethanol blends

If your area was already covered by a prior governor notice, the bill says the updated vapor-pressure limit should apply to E10–E15 blends during the high-ozone season, which may expand E15 availability.