State warns of blue-green algal bloom in Locke Lake

An elevated cyanobacteria cell concentration has been measured in Locke Lake in Barnstead. Samples revealed that the state standard of 50-percent or greater of the total cells from the bloom were identified as the cyanobacteria Anabaena circinalis. As a result, the New Hampshire Department of Environmental Services (DES) has issued a cyanobacteria warning for those who recreate on Locke Lake. This warning is not based on a toxin evaluation and is intended as a precautionary measure for short term exposure. DES advises lake users to avoid contact with the water in areas experiencing elevated cyanobacteria cell conditions typically where lake water has a surface scum or blue-green flecks. DES also advises pet owners to keep their pets out of any waters that have a surface scum or blue-green or bright green flecks.

Lake users should be on the lookout for cyanobacteria surface scums. Recent sightings report congregations of the blue-green scum on the lake’s edge.

The warning will remain in effect until additional samples reveal cyanobacteria levels have diminished.

If you notice anything resembling cyanobacteria, please refrain from wading, swimming, or drinking the water. Keep all pets out of the water and contact DES immediately. Please call DES to report a cyanobacteria bloom at (603)419-9229