Oregon Revised Statutes Cities § 222.870

(1) Upon receipt of the certified copy of the resolution, and verification by the local board of health having jurisdiction, the Oregon Health Authority shall review and investigate conditions in the affected territory. If it finds substantial evidence that a danger to public health exists in the territory, it shall issue an order for a hearing to be held within the affected territory, or at a place near the affected territory if there is no suitable place within that territory at which to hold the hearing, not sooner than 30 days from the date of the order.

(2) Upon issuance of an order for a hearing, the authority shall immediately give notice of the resolution and order by publishing them in a newspaper of general circulation within the city and the affected territory once each week for two successive weeks and by posting copies of the order in four public places within the affected territory.