PORTLAND, Ore. – The Department of Environmental Quality confirmed the presence of toxic blue-green algae in the Willamette River.
The Oregon Health Authority issued a health advisory for the area July 9. The algae bloom was confined to the Ross Island Lagoon, DEQ officials said.
Results from samples taken from the lagoon confirmed algae toxins present. The DEQ will retest the river water next week.
Samples taken from the Riverplace Marina were not toxic, according to the DEQ.
As with past algae bloom advisories, the OHA cautioned people and their pets to stay out of the water and avoid drinking it.
The algae was spotted last week, according to the Willamette Riverkeeper. It grew Monday, and the nonprofit believes the low river levels and heat made it grow.