- New Hampshire officials have issued two warnings about potentially dangerous algae blooms in Lake Winnipesaukee.
- Cyanobacteria, or blue-green algae, have been detected at Cary Beach and Brewster Beach in Wolfeboro, and 19 Mile Bay and Tuftonboro Neck in Tuftonboro.
- Visitors are advised to avoid contact with water and keep pets away from affected areas.
New Hampshire officials have twice issued warnings about potentially dangerous algae blooms in parts of Lake Winnipesaukee, the state’s largest lake.
The New Hampshire Department of Environmental Quality announced Thursday that it had detected high concentrations of cyanobacteria, also known as blue-green algae, on Cary and Brewster beaches in Wolfeboro, and the previous day in 19 Mile Bay and Tuftonboro Neck in Tuftonboro.
In a statement, the department advised visitors to avoid contact with the water and keep pets away.
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The cyanobacteria bloom appears as a green cloud of material that deposits along coastlines, and in some areas appears more yellow because it mixes with dense pollen, the agency said.

New Hampshire officials have issued two warnings of potentially dangerous algae blooms in parts of Lake Winnipesaukee (pictured above), the state’s largest lake. (Jerry Fagan via iStock)
According to the agency, symptoms of exposure to cyanobacteria include skin irritation, stomach cramps, vomiting, nausea, diarrhea, fever, sore throat, headache, muscle and joint pain, blisters in the mouth and acute liver damage.
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The affected areas will be re-sampled on June 19 and will continue to be re-sampled weekly if the algae blooms persist, the agency said.





