A safety advisory has been issued for anyone planning to visit the Ross Island Lagoon or a part of the Willamette River from ...

The thick, green layer of toxin-producing algae currently growing on the Willamette River south of downtown Portland is not ...

There is a health advisory in place for Ross Island Lagoon, as well as for the Willamette River south of the lagoon and ...

A recreational use advisory has been expanded for the Willamette River to include the Ross Island Bridge downriver to Wapato ...

The bloom carrying blue-green cyanobacteria — a perennial summer problem — can cause health problems if ingested and can be ...

A blue-green algae bloom surfaced yet again in the Ross Island lagoon over the weekend — the latest in a string of ...

Health officials advised people not to swim in the area and to avoid high-speed water activities like water skiing or power boating.

The Ross Island lagoon isn't the only source of potentially toxic river algae near Portland, but it tends to be the leading culprit when summertime blooms appear.

Broadcast: Tuesday, July 23 FILE - An aerial view on Aug. 19, 2021, of algal blooms in the Ross Island Lagoon, to the right of the Willamette River's mainstem. Brandon Swanson / OPB 00:00 / 12:45 ...