Oregon Revised Statutes Utility Regulation § 757.069

(1) If a customer of a water utility fails to pay a water bill for more than 120 days after the bill becomes due, the water utility shall mail notice of the delinquency to the persons who are listed as the owners of the property in the real property tax records for the county only if the utility asserts that the property owners are responsible for the bill. The notice must be mailed to the addresses of the owners as reflected in the real property tax records.

(2) The provisions of this section apply to water utilities operated by public utilities, municipalities, cooperatives and unincorporated associations.