Algae growth and algae blooms can be a relatively common occurrence in nearly any standing fresh body of water. The toxicity of any algae bloom or lack therof can only be determined by testing, and only a few types of bluegreen algae are known to produce toxins. Many of the lakes and reservoirs in the state are monitored for toxic algae blooms and the public is notified when these blooms occur.
However, it is important to always look for the signs of an algae bloom before you enter the water. For more information on algae blooms, please call the Oregon Health Authority (OHA) at 1-877-290-6767, or 971-673-0400. You can also find more information at their website by clicking here: OHA Algae Blooms.