Ohio Rev. Code § 6121.16
The exercise of the powers granted by Chapter 6121. of the Revised Code, will be in all respects for the benefit of the people of the state, for the improvement of their health, safety, convenience, and welfare, and for the enhancement of their residential, agricultural, recreational, economic, commercial, and industrial opportunities and is a public purpose. As the operation and maintenance of water development projects will constitute the performance of essential governmental functions, the Ohio water development authority shall not be required to pay any taxes or assessments upon any water development project, or upon any property acquired or used by the authority under Chapter 6121. of the Revised Code, or upon the income therefrom. The exemption from taxes and assessments granted to the Ohio water development authority by this section does not relieve from liability for such taxes and assessments those persons that are specifically liable, under division (B) of section 6121.044 of the Revised Code, for payment of taxes and assessments levied upon waste water facilities and water management facilities. The transfer to or from the Ohio water development authority of title or possession of any water development project, part thereof, or item included or to be included in any such project, is not subject to the taxes levied pursuant to Chapters 5739. and 5741. of the Revised Code, and the bonds and notes issued under this Chapter, their transfer, and the income therefrom, including any profit made on the sale thereof, shall at all times be free from taxation within the state.
R.C. § 6121.16