The Cape Cod National Seashore has issued a Public Health Advisory for Slough Pond (Truro), effective August 14, 2025, to alert the public to the SUSPECTED presence of Cyanobacteria.
Cyanobacteria are also called blue-green algae and are microscopic organisms that can grow excessively in warmer water, producing “blooms” of algal overgrowth. A cyanobacterial bloom can be harmful when the toxins it produces reach concentrations that are dangerous to humans, pets, and other animals.
Slough Pond has been posted with an Advisory that provides information for users of the pond. The Advisory cautions the public not to swim in the pond and to keep pets from entering the pond. Ingestion of the water is considered dangerous and may cause significant illness to humans and pets, and pets should be washed off if they enter the pond.
