The Health Department states that not all cyanobacteria are harmful, but urges people to take caution
On Friday, June 26, the Department of Environment and Local Government’s Health Department released a statement encouraging New Brunswickers to be aware of cyanobacteria as temperatures increase.
Cyanobacteria, commonly known as blue-green algae, can be found in bodies of water like lakes and rivers.
While not all cyanobacteria are harmful, some species can produce toxins that pose risks to people, pets, livestock, fish and wildlife.
“We want New Brunswickers to enjoy the outdoors and make the most of the province’s recreational waters, while also understanding the potential health risks associated with cyanobacteria,” said Dr. Yves Léger, chief medical officer of health.
“By learning how to recognize cyanobacteria blooms and benthic mats, residents can take simple steps to protect themselves, their families and their pets.”
Cyanobacteria can appear in different forms. Surface blooms are often blue-green but may also be green, red or brown. Benthic mats develop along the bottom of lakes and rivers and can resemble dark green, brown or black vegetation. When washed ashore and dried, these mats may appear grey or brown and can attach to rocks, aquatic plants and other surfaces.
Exposure to cyanobacteria toxins can cause skin, eye and throat irritation. Swallowing contaminated water may lead to stomach and intestinal illness. Pets and other animals are particularly vulnerable, and exposure can lead to serious health consequences.
“Cyanobacteria blooms can develop quickly and may not always be easy to predict,” said Léger.
“Before entering any lake or river, take a moment to assess the water and shoreline. Avoid swimming or wading in areas where blooms or mats are visible.”
New Brunswickers are encouraged to follow these safety precautions when enjoying recreational waters:
- Always supervise young children and pets near recreational waters.
- Do not swallow lake or river water.
- Bathe or shower after being in recreational waters.
- Do not enter the water with open cuts or sores.
- Always wash your hands before eating.
The Department of Health reminded people to avoid handling benthic mats while swimming, fishing, boating, or wading, as they can be toxic ot pets.
Because these mats can emit an odour that attracts animals, dogs should be prevented from eating shoreline vegetation or floating mats. People should also avoid handling benthic mats while swimming, fishing, boating or wading.
“Through research, water testing and strong partnerships, we are improving our understanding of cyanobacteria in New Brunswick, including where they occur, the types of toxins they may produce, and the environmental conditions that influence their growth,” said Environment and Climate Change Minister Gilles LePage.
“This knowledge will help support informed decision-making and the protection of New Brunswick’s water resources.”
More information about cyanobacteria – including how to identify blooms to reduce exposure risks, and how to report blooms to the department – is available online.
