State officials revoked a water-quality warning earlier this week at Mascoma Lake after samples showed the concentration of cyanobacteria in the water dropped between 70 and 80 percent since they first posted the caution late last week.

A sample taken at Dartmouth Yacht Club on Tuesday contained 14 percent cyanobacteria -- well below the 50 percent state threshold for a warning. But a state expert said the reduced levels don't mean the cyanobacteria have disappeared, and officials will continue to take water samples from the lake each week. » Read more

State officials have posted a water-quality warning for Mascoma Lake, after tests showed elevated levels of cyanobacteria, also known as blue-green algae, in the lake.

The state advises against swimming in the lake, but does not warn against boating or fishing. Lakes, ponds and coastal waters in New Hampshire are routinely monitored for cyanobacteria, which can be harmful to people and pets.

But it was tip from a concerned citizen in Enfield that triggered the warning for Mascoma Lake, according to Jody Connor of the New Hampshire Department of Environmental Services. » Read more

Enfield — Alyssa Wormer of Lebanon went for a swim last weekend in Mascoma Lake and said the only thing of note was the cold water.

Chad Michetti of Canaan fished for trout near the dam yesterday as his 4-year-old son, Asa, climbed rocks and dipped his feet into the water.

And Rich and Mary Lord of Claremont are gearing up for another summer of boating and swimming from their spot at Mascoma Lake Campground.

Around Mascoma Lake yesterday, residents and business owners for the most part said they had been following reports that Dartmouth-Hitchcock Medical Center researchers are trying to determine if there is link between a neurotoxin that may be found in blue-green algae known as cyanobacteria and a cluster of nine cases of Lou Gehrig's disease around the lake. » Read more

Enfield — The New Hampshire Department of Environmental Services yesterday issued a warning that elevated levels of cyanobacteria have been measured in Mascoma Lake.

DES in a news release advised lake users to avoid contact with the water in areas where lake water has a surface scum or blue-green flecks, and advised pet owners to keep their pets out of any waters that have a surface scum or blue-green or bright green flecks. » Read more