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Algae Bloom Advisories
When in doubt, stay out!

Exposure to harmful algae blooms increases in warmer months. OHA staff advise people to be alert for algae blooms when recreating in your favorite swimming or fishing hole.

  • Avoid waters that look suspicious (foamy, scummy, thick like paint, pea-green, blue-green or brownish red).
  • Remember, even if an advisory is not in place or you didn't notice a sign, you are always your own best advocate when it comes to looking out for you, your family and your pets.

The map and table below are continually updated with the most current information on advisories issued and lifted throughout the season for waterbodies that are monitored. NOTE: Only a fraction of all waterbodies in Oregon are monitored due to limited physical and monetary resources.

Douglas County Permanent Health Advisory - South Umpqua River and Lawson Bar
A permanent health advisory is in place for the pools of water that form in the bedrock along the rivers edge. These pools are known to develop cyanobacterial (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. Permanent Umpqua River Sign.jpgPermanent Umpqua River Sign (.jpg)


2015 Advisory Listing  (Click on issued or lifted date to view news release)
# Waterbody Region County Dominant species / toxin Cell count/
(start date)
(end date)
Duration (days)

Details of historical health advisories issued in previous years can be found in the Advisory Archive.

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