Oregon
Toxic algae in Morrow County lakes
1 lake or waterway in Morrow County has harmful algal bloom reports in Oregon's official data. The most recent entry is for Willow Creek Reservoir: Oregon's archive has no advisory for Willow Creek Reservoir in 2025. The last was a health advisory in 2024. Willow Creek Reservoir has had blooms in three or more years.
Lakes with bloom history
Newest report first. Each lake has its own page with the full history and what the results mean.
Source: Oregon Health Authority (OHA), official data, checked 24 October 2026. For today's conditions see the OHA current advisories page. No report doesn't mean a lake is safe: most water is only tested occasionally.