Oregon Officials Lift Health Advisory for Emigrant Lake

Near Ashland, Oregon- The Oregon Health Authority has lifted a recreational use health advisory for Emigrant Lake in Jackson County after water monitoring confirmed that cyanotoxin levels are below recreational guideline values.

The advisory was originally issued on May 1 following photo and satellite imagery evidence suggesting the presence of potentially toxin-producing cyanobacteria near high-use recreational areas.

While conditions at Emigrant Lake have improved, OHA urges visitors to remain vigilant. Cyanobacteria blooms can shift quickly, appearing and disappearing as conditions like light, temperature, and nutrient levels change. Wind and water movement can also affect bloom visibility throughout the day.

The agency reminds the public that only a fraction of Oregon’s water bodies are monitored for harmful algal blooms. OHA encourages individuals to learn the signs of cyanobacteria presence, associated health risks, and symptoms of exposure by visiting OHA’s Cyanobacteria Blooms website.

When recreating, people—especially children and pets—should avoid water that appears foamy, scummy, or thick like paint, or displays pea-green, blue-green, or brownish-red discoloration. Activities that involve swallowing water or inhaling droplets, such as swimming or high-speed water sports, should be avoided in affected areas.

Cyanotoxins can remain in the water even when it appears clear, as blooms may release toxins when they die off or are pushed into other areas. Some cyanobacteria may also attach to sediment or aquatic plants and continue to pose risks without obvious surface signs.

OHA continues to emphasize the importance of personal awareness when enjoying Oregon’s lakes and waterways.