CULVER, OR -- The Oregon Health Authority has issued a precautionary advisory for Lake Billy Chinook, near Culver, lasting through summer.

Cyanobacterial algae blooms routinely develop in the lake, and can be harmful when ingested, especially for pets. Since 2015, blooms have consistently produced toxins in the water, forcing the OHA to issue and lift advisories periodically throughout the summer. Officials say testing is costly, making it difficult for local water managers to regularly test the lake and determine when cyanotoxins are being produced. The agency says a seasonal alert for 2019 is more practical. 

Last summer, local businesses grew frustrated with the warnings issued by the OHA.

Exposure to the toxins can lead to symptoms similar to food poisoning. The advisory remains in effect until November first.