Oregon Revised Statutes Public Health and Safety § 454.295

(1) After receiving a certified copy of a resolution or ordinance adopted under ORS 454.285, the Environmental Quality Commission shall review and investigate conditions in the affected area. If substantial evidence reveals the existence of a threat to drinking water, the commission shall set a time and place for a hearing on the resolution or ordinance. The hearing shall be held within or near the affected area. The hearing shall be held not less than 50 days after the commission completes its investigation.

(2) The commission shall give notice of the time and place of the hearing on the resolution or ordinance by publishing the notice of adoption of the resolution or ordinance in a newspaper of general circulation within the affected area once each week for two successive weeks beginning not less than four weeks before the date of the hearing and by such other means as the commission deems appropriate in order to give actual notice of the hearing.