Ohio and 26 States Ask the U.S. Supreme Court to Stop the EPA's Power Plant Rule July 23, 2024 Washington, D.C.鈥擮hio is one of 27 states that filed a motion with the U.S. Supreme Court to stay EPA鈥檚 power plant rule that was finalized in early May.聽 EPA power plant rule reliability Read more about Ohio and 26 States Ask the U.S. Supreme Court to Stop the EPA's Power Plant Rule