The N.W.T.'s Department of Environment and Climate Change and the Canadian Coast Guard tested samples from various locations in the area. The results showed no toxins present.

New Hampshire officials issued two warnings of potentially dangerous algae blooms along parts of Lake Winnipesaukee, the state’s largest lake. The New Hampshire Department of Environmental Services said on Thursday it detected high...

Meech Lake beach is closed due to a potentially harmful blue-green algae bloom, alongside a fire ban affecting Gatineau Park areas.

An unusually large Noctiluca bloom in Kasaan Bay. Noctiluca scintillans is a non-toxic algae bloom, generally considered harmless to humans.