The information below can be found at: http://www.des.nh.gov/media/pr/2017/20170803-cyanobacteria-pelham.htm
State Issues Cyanobacteria Warning for Little Island Pond, Pelham
Concord, NH – An elevated cyanobacteria cell concentration has been measured in Little Island Pond, Pelham. Samples revealed that the state threshold of 70,000 cells/ml or greater of cyanobacteria was exceeded. The cyanobacteria were identified as Anabaena. As a result, the New Hampshire Department of Environmental Services (NHDES) has issued a cyanobacteria warning for those who recreate on Little Island Pond. The current bloom is variable with some portions free of scum sightings while other areas have a green surface film. Please continue to monitor your individual shoreline for changing conditions.
This warning is not based on a toxin evaluation and is intended as a precautionary measure for short term exposure. NHDES advises lake users to avoid contact with the water in areas experiencing elevated cyanobacteria cell conditions typically where lake water has a surface scums or streaks. NHDES also advises to keep pets and small children out of any waters that have green turbid water, surface scums or other blue-green flecks in the water column.
NHDES routinely monitors for cyanobacteria at public beaches and public waters for New Hampshire. Once a cyanobacteria warning has been issued, NHDES returns to affected waterbodies on a weekly basis until the cyanobacteria standards are again met. Cyanobacteria are natural components of water bodies worldwide, but blooms and surface scums may form when excess phosphorus is available to the water. Some cyanobacteria produce toxins that are stored within the cells but released upon cell death. Toxins can cause both acute and chronic health effects that range in severity. Acute health effects include irritation of skin and mucous membranes, nausea, vomiting, and diarrhea. Chronic effects include liver and central nervous system damage.
The warning went into effect on August 3, 2017, and will remain in effect until additional samples reveal cyanobacteria levels have diminished.
Visit the NHDES Beach Program website for photos and more information about cyanobacteria at https://www.des.nh.gov/organization/divisions/water/wmb/beaches/index.htm
Updates on advisories and warnings may be obtained at
http://www4.des.state.nh.us/WaterShed_BeachMaps/WaterShed_BeachMaps.aspx
Follow the Beaches twitter feed:
https://twitter.com/NHDES_Beaches
If you notice anything resembling cyanobacteria, please refrain from wading, swimming, or drinking the water. Keep all pets out of the water and contact NHDES immediately. Please call NHDES to report a cyanobacteria bloom at (603) 848-8094.