A link to Lou Gehrig's disease in lake water?

From the Manchester, NH Union Leader (6/7):

The risk of developing a fatal neurodegenerative disease is 25 times higher than the norm for people who live around Mascoma Lake, according to researchers studying the possibility of a link between lake bacteria and neurological illness.

Over a recent six-month period, three people residing on the north shore of Mascoma Lake were diagnosed with Amyotrophic Lateral Sclerosis (ALS), also known as Lou Gehrig's Disease. So far, nine cases of the disease have been confirmed near the lake.

Doctors and scientists at Dartmouth-Hitchcock Medical Center in Lebanon say there is strong evidence that suggests cyanobacteria, single-celled organisms that form on lakes and ponds and release harmful toxins, are an environmental trigger for the development of ALS in people who are genetically predisposed to the illness.