The Town of Sudbury is issuing an advisory regarding the presence of a cyanobacteria bloom throughout Hop Brook.

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This advisory is due to the presence of high levels of cyanobacteria (blue-green algae) in Hager Pond in Marlborough which is flowing down the Hop Brook in Sudbury and the potential for toxins to be present. The public is advised to avoid contact with the water until further notice, including swimming, fishing, and boating.  Visitors and pets should not touch, enter, or ingest the water from Hop Brook until further notice.  Recreators should not participate in activities where water has scum or discoloration. If pets or humans have contact with the water, they are advised to wash the contacted immediately with clean water. Call your doctor or veterinarian if you or your animals have a sudden, unexplained illness or rash.

A fact sheet containing information on cyanobacteria, what it is, and health risks associated with it can be found at: https://www.cdc.gov/harmful-algal-blooms/about/index.html?CDC_AAref_Val=https://www.cdc.gov/habs/materials/factsheets.html

For more information, please contact the Conservation Department at (978) 440-5471 or concom@sudbury.ma.us or the Sudbury Health Department at (978) 440-5479 or health@sudbury.ma.us.

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