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Current Cyanobacteria Advisories

The table below is continually updated with the most current information on recreational use health advisories issued and lifted throughout the season for monitored and sampled water bodies.

Remember: Only a fraction of all water bodies in Oregon are visually monitored or sampled due to limited physical and monetary resources. A water body with no recreational health advisory is not an indication that a bloom is not present. You are your own best advocate when ensuring your safety, and that of your family and pets. Be aware and "when in doubt, stay out."

advisory= Advisory in effect  lifted= Advisory has been lifted  permanent= Permanent advisory


Waterbody 
Status 
Link 
County 
Toxin  Data (ppb)

Willow Creek Reservoir
advisory= Advisory in effect
October 3, 2022
Morrow
Cyanobacteria
n/a
Willamette River between Willamette Cove and Cathedral Park
lifted= Advisory has been lifted
September 16, 2022
Multnomah
Microcystin
9 ppb
Hells Canyon Reservoir
advisory= Advisory in effect
August 8, 2022
Wallowa and Baker
Cyanobacteria
n/a

Brownlee Reservoir
advisory= Advisory in effect
August 5, 2022
Baker
Cyanobacteria
n/a
Cronemiller Lake in Benton County
lifted= Advisory has been lifted
August 3, 2022
Benton
Cyanobacteria
n/a
Upper Klamath Lake 
advisory= Advisory in effect              
July 28, 2022
Klamath
Microcystin
61 ppb
South Umpqua River and mainstem Umpqua River permanentPermanent Recreational Use Advisory Posted SignDouglas




Douglas County Permanent Recreational Use Advisory: South Umpqua River and mainstem Umpqua River

The advisory covers the South Umpqua River from Canyonville downstream to the confluence with the mainstem Umpqua River, and the mainstem Umpqua River downstream past Elkton to Lawson Bar. Pools in the bedrock along the rivers edge are known to develop cyanobacteria (blue-green algae) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted at several access areas along the river.