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State Removes Cyanobacteria Warning for Province Lake, Effingham

September 16, 2010
CONCORD The cyanobacteria cell concentration in Province Lake, Effingham, is below the state standard of 50 percent of the total cells. As a result, the New Hampshire Department of Environmental Services (DES) has removed the cyanobacteria warning issued on September 3rd.

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 blue-green globs. DES also advises pet owners to keep their pets out of any waters that have blue-green or bright green globs.

DES routinely monitors public beaches and public waters of the state for cyanobacteria. DES monitors public waters issued cyanobacteria warnings 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.

Visit the DES Beach Program website at http://des.nh.gov/organization/divisions/water/wmb/beaches/index.htm for photos and more information about cyanobacteria. Updates on advisories and warnings may be obtained at http://www2.des.state.nh.us/Advisories/Beaches/

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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.

Martin Lord Osman
Brewster Academy
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