Five beaches in King County have high levels of bacteria, according to the local health department. One has toxic algae.

"If our lake is in danger, then our livelihood is in danger," said a local business owner who is raising funds and awareness.

A number of Minnesota cities have reported blue-green algae blooms this summer, causing the temporary closing of some beaches ...

As the Fourth of July approaches, several beaches across Illinois, Washington, New York, Massachusetts, Michigan and ...

Several popular swimming areas in Putnam County have been temporarily shut down due to harmful algae blooms and elevated ...

Several popular swimming areas in Putnam County have been temporarily shut down due to harmful algae blooms and elevated ...

A team of researchers is tapping into the ocean’s vast body of free-floating environmental DNA to catch blooms before they ...

A new study led by Harvard biologists describes how some sea slugs consume algae and incorporate their photosynthetic ...

People are being warned about the presence of blue-green algae in the water on the Norfolk Broads at South Walsham.

The blooms have become an annual problem in the Great Lakes. DNA studies show what’s growing there and why it’s dangerous.

Algal blooms can transform water sources into health hazards for livestock, so understanding how to identify, prevent and ...

Officials have closed off swimming at beaches in at least six states due to high bacteria levels. Here's where those closures ...