Cyanobacteria

New Hampshire Department of Environmental Services

It’s now common for the New Hampshire Department of Environmental Services to issue advisories each summer, warning swimmers of bacterial blooms along Northeastern beaches.

Cyanobacteria, which is also known as blue-green algae, has become prevalent throughout the Northeast. Now researchers from Dartmouth, University of New Hampshire, and the Cary Institute of Ecosystem Studies are collaborating with the Lake Sunapee Protective Association to find out why.

Wikimedia Commons

The New Hampshire Department of Environmental Services says it is seeing an increase of dangerous levels of cyanobacteria in some lakes and ponds.

The most recent advisories include French and Keyser ponds in Henniker, Sebbins Pond in Bedford and Lee's Pond in Moultonborough. Warnings have been posted at sites affected by the bacteria and also at public beaches with advisories for fecal contamination, such as Opechee Park Cove Beach in Laconia. Conditions include surface scums, or streaks, or blue-green flecks in the water.

Courtesy DES

To everything there is a season and this is the season when we go swimming and we spend a lot of time talking about Cyanobacteria. So what is it, exactly? we spoke with Sonya Carlson in 2016 when she was the head of the Beach Inspection Program with the state Department of Environmental Services and gave us a primer on the micro-organism.

USGS website

Cyanobacteria advisories are in place at Elm Brook Park beach in Hopkinton and Silver Lake State Park Beach in Hollis. 

State officials are urging visitors to stay out of the water if they observe blue-green scum or clumps suspended in the water column. Cyanobacteria can be toxic to both humans and dogs. 

Courtesy DES

To everything there is a season and this is the season when we go swimming and we spend a lot of time talking about Cyanobacteria. So what is it, exactly? Sonya Carlson is head of the Beach Inspection Program with the state Department of Environmental Services and gave us a primer on the micro-organism.