The swim area at Kettletown State Park in Southbury is closed due to the presence of blue-green algae in the water, according to the Department of Energy and Environmental Protection.
DEEP officials said the toxic algae blooms started appearing late last week. A warning was posted Friday warning swimming to stay away from areas with a greenish film on the water’s surface, and DEEP made the decision to completely close the swimming area Sunday.
Blue-green algae blooms are naturally-occurring phenomena caused by nutrient loading and high temperatures. The algae blooms release toxins that can be harmful to humans and pets, causing skin irritation, breathing problems, and gastroenteritis, according to the Centers for Disease Control and Prevention.
Swimming will remain closed until the condition clears up.
There is also a warning out for the algae at Indian Well State Park in Shelton, but the swim area at that location remains open.
Five state swimming areas were closed Friday after routine testing showed high levels of bacteria. Those areas are Gardner Lake State Park in Salem, Gay City State Park in Hebron, Mashamoquet Brook State Park in Pomfret, Quaddick State Park in Thompson, and Wadsworth Falls State Park in Wallingford.
The other areas of the parks remain open for recreation.