NH Environmental Services removes cyanobacteria warning for Lake Winni in Meredith

MEREDITH — The New Hampshire Department of Environmental Services removed a cyanobacteria advisory for Lake Winnipesaukee near the Pine, Bear and Three Mile islands Wednesday. The warning was initially issued Sept. 13. Although there is no longer an advisory, the NHDES says to keep an eye out for green algae accumulations or scum on the surface of the water. Cyanobacteria blooms occur when a surge of nutrients like phosphorus and nitrogen enter a body of water in a short period of time. Events like large rainstorms can result in a nutrient surge.

Cyanobacteria is very common in water bodies around the world, and is safe at low concentrations. However, when too many nutrients enter the water body at once, the bacteria can grow to unsafe levels, resulting in potential health risks.

Contact with high concentrations of cyanobacteria can result in irritated skin, numbness, nausea, vomiting, seizures and diarrhea. The bacteria can also cause chronic health problems like damage to the liver and central nervous system. Exposure can also be highly dangerous to pets.

Anyone who spots a suspicious algae bloom can report it by calling ​​603-848-8094 or emailing HAB@des.nh.gov.