Ohio Rev. Code § 3718.025
The environmental protection agency shall not require a board of health to enter into a memorandum of understanding or any other agreement with the agency regarding the issuance of national pollutant discharge elimination system permits for off-lot household sewage treatment systems. Rather, a representative of a board of health may meet with a person who intends to install such a system to determine the feasibility of the system and refer the person to the agency to secure a national pollutant discharge elimination system permit for the system if needed. The environmental protection agency shall make revisions to any applicable general national pollutant discharge elimination system permits, issued pursuant to the federal Water Pollution Control Act as defined in section 6111.01 of the Revised Code, so that such a memorandum of understanding is not required. A board of health voluntarily may enter into a memorandum of understanding with the environmental protection agency to implement a general national pollutant discharge elimination system permit. The agency shall work with boards of health to facilitate securing national pollutant discharge elimination system permits on behalf of property owners in counties without a memorandum of understanding.
R.C. § 3718.025