A health advisory was issued Friday, June 30, for Lake Billy Chinook, west of Madras, after county and state agencies confirmed the presence of toxic blue-green algae.
The toxins can be harmful to humans and animals.
The advisory was for the Metolius River Arm, from Perry South Campground to the northern tip of Chinook Island; the Deschutes River Arm, for all areas around Cove Palisades State Park, the day-use areas and boat docks; and the Crooked River Arm, for all areas around the day-use area past Cove Palisades Resort and Marina to the confluence of the Deschutes River Arm.
People should avoid swallowing water while swimming, or inhaling water droplets during high-speed water activities.
The algae toxins can not be removed by boilinig filtering or treating water with camping-style filters.