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New Hampshire Department of Environmental Services
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FOR IMMEDIATE RELEASE
DATE: June 29, 2018
CONTACT: Amanda McQuaid (603) 271-0698 (O), 848-8094 (C)
des.nh.gov
twitter.com/NHDES

State Issues Cyanobacteria Advisory for the Weirs Channel in Laconia, New Hampshire

Concord, NH – A cyanobacteria bloom has been observed along the Weirs Channel in Laconia, New Hampshire. Based on visual evidence, the cyanobacteria bloom appears severe. Sightings have been reported, located in the Weirs Channel behind Channel Lane, between Paugus Bay and Lake Winnipesaukee (not far from Weirs Beach). As a result, the New Hampshire Department of Environmental Services (NHDES) has issued an advisory for cyanobacteria. It is advised to look out for accumulations in other areas of the lake or shorelines. Please continue to monitor your individual shoreline for changing conditions and avoid contact.

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 scum, green streaks or blue-green flecks aggregating along the shore. NHDES also advises pet owners to keep their pets out of any waters that have a cyanobacteria bloom.

NHDES routinely monitors public beaches and public waters of the state for cyanobacteria. Once a cyanobacteria lake warning or advisory 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 nutrients are 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, tingling, numbness, nausea, vomiting, seizures and diarrhea. Chronic effects include liver and central nervous system damage.

The warning went into effect on June 29, 2018, 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 www.des.nh.gov/organization/divisions/water/wmb/beaches/index.htm
Updates on advisories and warnings may be obtained at www4.des.state.nh.us/WaterShed_BeachMaps/WaterShed_BeachMaps.aspx
Follow the Beaches twitter feed:
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.

A cyanobacteria bloom has been observed along the Weirs Channel in Laconia, New Hampshire. Samples will be collected, identified and enumerated as soon as possible. Avoid contact with bloom accumulations.

Cyanobacteria bloom at Weirs Channel in Laconia




NH Department of Environmental Services | 29 Hazen Drive | PO Box 95 | Concord, NH 03302-0095
(603) 271-3503 | TDD Access: Relay NH 1-800-735-2964 | Hours: M-F, 8am-4pm

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