Unusual green scum along Willamette River near downtown Portland deemed safeBy Kristian Foden-Vencil (OPB)Oct. 16, 2023 10:59 p.m. Updated: Oct. 17, 2023 9:20 p.m.Health authorities investigated after unusual plants surfaced on the river. 📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up
