Cyanobacteria Update from NHDES

Please see the following report from NHDES

Hi All,

The cyanobacteria WARNING (ADVISORY) that was issued on 26 May 2023 has been REMOVED for Northwood Lake as of today 7 June 2023. I reviewed four samples from around the lake today. The highest observed density was 2,200 cells/mL, and some samples had no cyanobacteria present. There was a lot of pollen in some samples, so you may see yellow accumulations. Best practice is to avoid swimming in any accumulations! While the bloom appears to have has dissipated, NHDES advises that lake-goers look out for green surface accumulations in the future. Please continue to monitor your individual shoreline for changing conditions.

The red cyanobacteria advisory signs can now be removed from public access points. Thank you for your help with this!

Thank you all for your communication. If you see cyanobacteria in the future, please report it here!

Please forward this email to other residents / community members who need this information. If they would like to be added to the email distribution list, please have them sign up through this form to be directly included on future communications from NHDES. To sign up for Weekly Statewide Bloom Reports select the “Healthy Swimming Updates” email list.

For more information:
Report a CyanoHAB
Healthy Swimming Mapper
Frequently Asked Questions

Kate Langley Hastings
Cyanobacteria HAB Program Coordinator
Watershed Management Bureau, Water Division
New Hampshire Department of Environmental Services
29 Hazen Drive, P.O. Box 95, Concord, NH 03302-0095