Ohio Rev. Code § 6117.36: Writ of mandamus.

If the board of county commissioners fails after thirty days after the notice and order given to it by the director of environmental protection to perform any act required of it by sections 6117.01 to 6117.40 of the Revised Code, and by any such order and notice of the director, such order may be enforced by a writ of mandamus issued by any court authorized to issue such writs.