Oregon Revised Statutes Public Organizations for Community Service § 264.310

A district shall charge consumers for the water furnished and fix and collect the rates therefor. Rates charged may be fixed and classified according to the type of use and according to the amount of water used. Any contract entered into by a district with persons other than domestic users shall provide for immediate cancellation whenever no surplus supply of water exists over and above any and all demands of domestic users. A district also may contract with any person, or enter into intergovernmental agreements under ORS chapter 190, to supply, furnish and sell surplus water on such terms and conditions and at such rates as the board of commissioners considers advisable.