Cyanobacteria Bloom Awareness: You and Your Pet
Since most waterbodies in Oregon are not monitored, OHA staff recommend you become familiar with your surroundings and know the signs of a bloom before you take the plunge.
Don't go into water that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish red. A good rule of thumb for you and your pet is: When in Doubt, Stay Out!
If you believe you or your pet have been exposed to a cyanobacteria bloom, OHA staff are available to answer health related questions and to receive and document illness reports. We will also provide you with contact information for our partners who can give you the most up-to-date information about local recreation areas, water quality and sampling.
Current Cyanobacteria Bloom Advisories
The most current information on advisories issued and lifted throughout the season.
View a map and table of current recreational use health advisories for cyanobacteria and cyanotoxins
Sign up for email alerts
A yearly presentation of recreational use health advisories issued in Oregon since 2005.
Browse the summaries and view the data for each year
Frequently Asked Questions
Answers to common questions about blue-green algae blooms.
Browse the list of FAQs or download the brochure in English or Spanish
Advisory and Sampling Guidance
For lake managers and others who deal with cyanobacteria blooms.
View Advisory and Sampling Guidance
Education and Outreach
Brochures, posters, fact sheets and journal articles that cover basic information, human health, animal health, fish consumption and environmental concerns.
A list of some agencies involved in responding to cyanobacteria blooms.
Activities include: lake management, public health protection, and shellfish safety closures