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

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

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

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

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

Health officials in Utah are warning residents not to swim in or drink the water at Anderson Cove in the Pineview Reservoir ...

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

Winnipesaukee saw record cyanobacteria blooms, amid warmer temperatures and an increase in nutrients that feed the bacteria.

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

The concerning sample was taken earlier this week from Racy Point in St. Johns County, west of Elkton and north of Hastings.

Safety warnings have gone out for some 40 official wild swimming locations in Dutch waters because of blue algae, and two are ...