A 2024 satellite photo shows an unusually active bloom of toxic cyanobacteria swirling in the water of Nevada's Pyramid Lake.

We are starting two rulemakings to update Washington’s water quality standards to help address freshwater nutrient pollution and the harmful, toxic algal blooms that can result from it.

A sea lion with domoic acid poisoning from toxic algae blooms has beached itself in Redondo Beach on Tuesday, March 18, 2025.

It’s one of Australia’s worst underwater environmental catastrophes. What’s going to happen to South Australia’s vast algal ...

Harmful algal blooms in freshwater lakes, ponds, rivers, and streams generally consist of visible patches of cyanobacteria or blue-green algae. Cyanobacteria are naturally present in low numbers in ...

The following is a press release from the Humboldt County Department of Health and Human Services: A recent sampling event confirming dangerous levels of harmful algal toxins identified in Big Lagoon ...

During heavy rains, excess nutrients run into nearby watersheds, where they can feed potentially toxic algae blooms.

The City of Boulder is asking residents to keep themselves and their pets out of the water at the Boulder Reservoir due to a possible harmful algae bloom. Although the swim beach is closed for the ...

When researchers sampled brain tissue of stranded dolphins, they found Alzheimer’s disease-like developments and drastically ...

In a significant step toward dealing with the persistent harmful algal bloom affecting the South Australian coast, ...