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Oregon Health Authority

Education and Outreach

Get information about cyanobacteria harmful algae blooms (CyanoHABs), exposure pathways, health effects, and the science behind the blooms. 

Risk Communications Toolkit

Learn about cyanobacteria blooms and other water issues

Animal safety


Photos of cyanobacteria blooms


For physicians and veterinarians

Blue-green algae supplements: What you should know

Blue-green algae (cyanobacteria) is harvested from Upper Klamath Lake in Oregon and used in dietary supplements and other food products. These products can become contaminated with cyanotoxins, which may harm people or pets. 


For information about these products, please visit the US Food and Drug Administration’s Blue-Green Algae Products and Microcystins webpage.


Articles