Lake Attitash, MA, Plagued by Blue-Green Algae

Cyanobacteria used to be called “blue-green algae,” but they are actually large photosynthetic bacteria. Here, Cyanobacterial filaments of the genus Oscillatoria form a Cyanobacterial Mat in the salt marsh at Heron’s Head Park, San Francisco. Photo/

Newburyport News: Those looking to enjoy any beach weather in the near future should be sure to cross Lake Attitash [Massachusetts] off the list of places to visit.

The lake that straddles the Amesbury and Merrimac line has the distinction of being the only water body in Massachusetts that state officials recommend residents steer clear of and avoid contact with because of a blue-green algae bloom, according to the state Department of Public Health.

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Newburyport News

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