PORTLAND, Ore. (KOIN) – A safety advisory has been issued for anyone planning to visit the Ross Island Lagoon or a part of the Willamette River from the Ross Island Bridge downriver to Wapato Bridge ...

PORTLAND, Ore. — The Oregon Health Authority has issued a health advisory warning people and pets to stay out of Ross Island Lagoon and a stretch of the Willamette River out to Sauvie Island due to a ...

PORTLAND Ore. (KPTV) - A recreational use advisory was expanded for the Willamette River from the Ross Island Bridge downriver to the Columbia River, authorities announced Wednesday. The Oregon Health ...

Criteria evaluated for each beach are: high recreational use, history of nearby pollution hazards, previously measured high ...

PORTLAND Ore. (KPTV) - On Tuesday afternoon, the Oregon Health Authority (OHA) lifted an advisory for recreation on the Willamette River in Portland after determining a toxic algae bloom has mostly ...

Update August 19, 2025: The Oregon Health Authority lifted its advisory warning of a harmful algal bloom on the Willamette River, stating "water monitoring has confirmed that the level of cyanotoxins ...

Evan Rodriguez / OPB In recent years, the Willamette River has become prone to blooms of cyanobacteria, more commonly known as “blue-green” algae. The algae can pose significant health risks for ...