When a greenish cloud, surface scum or other suspicious algae appears in a previously clear lake, the message is clear: Stay away. As cyanobacteria blooms become more common in New Hampshire, that precaution has become common practice across the state. The reason? Cyanobacteria, an ancient single-celled organism that multiplies to excess when nutrients and heat […]

Clear waters in Moultonborough’s Lake Kanasatka this summer strengthened residents’ hopes that an expensive, last-ditch chemical treatment undertaken several years ago was paying off. This year has been a “beautiful” one on the lake, said waterfront resident Kevin Kelly. Conditions have improved each year since the treatment was applied in 2024, after anguish and health […]