Blue-green algae (Cyanobacteria)

Blue-green algae (Cyanobacteria)

The City of Fredericton works hard to protect everyone in the community. We encourage citizens to get informed to ensure day-to-day personal safety.  

Blue-green algae (Cyanobacteria) has been found present in the Saint John River. These organisms are found in different water systems and are toxic to humans. Individuals should avoid water-recreational activities in the infected areas.  

Humans are not the only ones affected by it. Some algae produce toxins that are highly toxic to dogs and other animals. We advise that citizens take responsibility for their pets as it is important to make sure they are not put at risk. 

How can I spot these algae? 

These algae can be mistaken with other non-toxic algae and plants. For a visual guide on how to spot Cyanobacteria click here (source: Environment and Climate Change in Canada). 

More information on these bacteria can be found in the Government of New Brunswick’s website.  

Health Canada provides a detailed guideline on its effects and managing health risks:  

• Guidelines for Canadian Recreational Water Quality: Cyanobacteria and their toxins 
• Guidelines for Canadian Drinking Water Quality: Cyanobacterial Toxins