Dear Members and Friends,
Although many of you have buttoned up your camps/summer houses for the season, this is to advise that cyanobacteria has been observed in the boat landing inlet (most concentrated near the dam and Edith’s beach with a lighter concentration at the boat landing). Experience has shown that cyanobacteria can come and go quickly but as a precaution signs will be posted to alert anyone who plans on using the lake while the bloom is visible. Because it is so late in the season we will not be gathering samples for transport to DES in Concord so this outbreak will remain unconfirmed. As of early this afternoon, other areas of the lake looked clear but again, this may change over the next few days. LWPA recommendation is to follow DES guidelines and not wade, swim or allow pets in the water until lake water is clear. This is not an official DES advisory (Alert notice below). Use common sense while boating and try to remain dry (when in doubt, stay out).
On Thu, Oct 26, 2023 at 4:14 PM DES: Harmful Algal Bloom Program <DES.HAB@des.nh.gov> wrote:
A cyanobacteria ALERT has been issued for Lake Warren, Alstead. Cyanobacteria activity was first observed on 26 October 2023, appearing as green flecks of material accumulating along some shorelines. This alert is based on this image, not a sample review. Following October 15, NHDES will not be collecting initial bloom samples. Samples will only be reviewed if delivered.
This is not an official cyanobacteria advisory, and signs do not need to be posted. The Alert will be active on the Healthy Swimming Mapper for at least a week. I will check in weekly to see if the bloom is visually persisting and will keep the Alert active until it has subsided.
Cyanobacteria bloom conditions can change rapidly, so it is best to be on the watch for developing conditions. NHDES urges lake users to perform visual assessments of the water prior to recreating. Stay out of the water and keep pets out if you can see any visual accumulation or discoloration of the water and report it.
Please forward this email to other residents / community members who need this information. If they would like to be added to this specific waterbody distribution list, please sign up here. If you prefer to no longer receive these sampling updates, simply respond, and indicate "unsubscribe". Sign up for weekly reports here.
Best,
Michele Condon
Beach Inspection Program Coordinator
Watershed Management Bureau, Water Division
New Hampshire Department of Environmental Services
29 Hazen Drive, P.O. Box 95
Concord, NH 03302-0095
603-848-1905