N.B. government warns public of blue-green algae health risks with temperatures rising

The New Brunswick government is reminding the public of the potential health risks from cyanobacteria, also known as blue-green algae, as temperatures rise.

Although not all blue-green algae are harmful, some produce toxins that can cause skin, eye and throat irritation. Ingesting these toxins may lead to stomach issues and can also harm pets, fish, wildlife and livestock, a news release said.

“We want all residents to be active and enjoy the outdoors, but we also want them to understand and consider the potential risks of exposure to cyanobacteria,” said Dr. Yves Léger, chief medical officer of health. “New Brunswickers are encouraged to familiarize themselves with the appearance of cyanobacteria blooms in order to minimize risks for themselves, their loved ones and pets.”

Surface blooms of cyanobacteria are usually blue-green, but can also appear green, red or brown.

“There are always things you can do to help protect yourself while enjoying recreational waters,” said Léger. “Cyanobacteria blooms can be unpredictable, so it’s important to always check the water and scan the shoreline before entering and avoid swimming in areas where there are visible blooms or mats.”

Benthic mats that form at the bottom of lakes and rivers can resemble clumps of vegetation and appear black, brown or dark green in water. They may turn brown or grey when dried on shore. Blue-green algae can be toxic and deadly to dogs in ingested. Owners should not allow dogs to eat shoreline vegetation or floating benthic mats.

Other safety warnings include:

• 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 government continues to support various cyanobacteria research projects through the Environmental Trust Fund,” said Environment and Climate Change Minister Gilles LePage. “These projects, which are underway throughout the province, are intended to build a better understanding of the distribution of cyanobacteria and potential toxins.”

For more New Brunswick news, visit our dedicated provincial page.