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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 
 
North Tenmile Lake
advisoryRecreational Use Advisory in Effect
Coos
Willow Creek Reservoir advisoryRecreational Use Advisory in Effect 10/11/2019 ISSUED Morrow
Lake Selmac
advisoryRecreational Use Advisory in Effect
Josephine
South Lake at Tenmile Lake
advisoryRecreational Use Advisory in Effect
Coos
Lake Billy Chinook
advisoryPrecautionary Seasonal Advisory in Effect
Jefferson
Cullaby Lake
liftedRecreational Use Advisory Lifted
Clatsop
Brownlee Reservoir
liftedIdaho DEQ Advisory Lifted
Washington (Idaho)
Hells Canyon Reservoir
liftedIdaho DEQ Advisory Lifted
Washington (Idaho)
Odell Lake
liftedRecreational Use Advisory Lifted
Klamath
Upper Klamath Lake
liftedRecreational Use Advisory Lifted
Klamath
South Umpqua River and Lawson Bar permanentPermanent Recreational Use Advisory Posted Sign Douglas

permanent Douglas County Permanent Recreational Use Advisory: South Umpqua River and 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.

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