PITTSFIELD, Mass. — Recent observations on Oct. 4 results have confirmed the presence of a blue-green algae bloom at Pontoosuc Lake that may present harmful health effects for users of the lake.

 

Accordingly, and as recommended by the Massachusetts Department of Public Health, a public health advisory is being issued.

 

Waterbody poses risk for people and pets.

• Do not swim.

• Do not swallow water.

• Keep animals away.

• Rinse off after contact with water.

 

Warning signs are being posted around the lake.

 

Blue-green algae, also known as Cyanobacteria, occur naturally in lakes and ponds throughout Massachusetts. These microscopic organisms are components of the aquatic food chain. In ordinary circumstances, Cyanobacteria cause no apparent harm. However, warmer water temperatures and high nutrient concentrations may induce a rapid increase in their abundance. This response is commonly called a "bloom" because algal biomass increases to the extent that normally clear water becomes markedly turbid.