BURLINGTON, Vt. — Floating colonies of potentially harmful , also known as blue-green algae, prompted Burlington officials to close all of the city’s public beaches to swimming Monday. 

Although the tiny organisms are always present in Lake Champlain, concentrations of them can create enough toxins to (particularly children) and be deadly to pets.. 

Monday’s sightings were the season’s first for the Burlington area. Sporadic blooms are common here through early fall, abetted by warm water temperatures.

Vermont isn’t the only state with an outbreak this summer. In the last week,  reported the state is warning people to avoid several bodies of water due to cyanobacterial blooms. And is telling residents to avoid East Fork Lake there.

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“It’s not uncommon; it’s not a surprise — but of of course, it’s disheartening,” said Lori Fisher, executive

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