Lake Kanasatka was resampled today, 10/20/2022. The cyanobacteria density has decreased from last week, the highest sample was from Glidden Road, with total density of 45,900 cells/mL of Dolichospermum and Aphanizomenon. The Kilnwood sample total was 9,034 cells/mL of Dolichospermum, Aphanizomenon and Woronichinia. The dam sample had a total of 14,566 cells/mL of Dolichospermum and Aphanizomenon. This is a huge improvement from densities observed last week, but considering the fluctuations we’ve observed, and the continued heightened density, I think we should wait for another sampling event prior to lifting this advisory. Unfortunately I will be at a conference all next week, so we won’t be able to review another set of samples until the first week in November. If samples continue to have low density after another round of sampling there will be greater confidence that the event has passed.

For now, please keep signs posted at public access points. If people ask for updates on the current cyanobacteria advisory status, please direct them to the Beach Advisories Mapper. If you click on the advisory symbol, you can see our most recent sampling date. When advisories are lifted, the red symbol for the waterbody will no longer be on the map. Please forward to other residents / community members around the waterbody, and provide me with any contacts (first and last names, and emails) of folks who want to be directly included on future communications from NHDES.

Thank you for your patience!

Kate Langley Hastings | Cyanobacteria HAB Program Coordinator | Watershed Management Bureau, Water Division | New Hampshire Department of Environmental Services