Ohio Rev. Code Ann. § 505.263

The board of township trustees may enter into a contract with the board of county commissioners under which the trustees agree to pay all or any part of the cost of constructing, maintaining, repairing, or operating any water supply improvement established within the limits of the township pursuant to Chapter 6103. of the Revised Code. The contract shall be upon mutually agreed terms. For the purpose of meeting contractual obligations incurred pursuant to this section, the board of township trustees may levy taxes, subject to Chapter 5705. of the Revised Code, and issue bonds and other evidences of indebtedness, subject to Chapter 133. of the Revised Code.