The health advisory isn’t a new phenomenon — Detroit Lake frequently had toxic algae blooms in the past, but this is the first one since 2018 and the first to include the North Santiam River.

“They prevented toxic algae blooms in 2020, 2021, 2023 and 2024, even with elevated chlorophyll concentrations (the amount of algae in the lake) in late 2023 and throughout 2024,” according to ...