Ohio Rev. Code Ann. § 3745.09

Upon investigation of any complaint filed under section 3704.06, 3734.10, 3745.08, or 6109.11 of the Revised Code, if the director of environmental protection finds that the violation is caused by or contributed to from air or water pollution sources outside Ohio, he shall immediately notify the responsible officials of the state in which the source lies, the United States environmental protection agency, and the attorney general of Ohio, in an effort to secure prompt compliance with all laws, regulations, and standards for the prevention, abatement, and control of air and water pollution and disposal of solid wastes.