Cyanobacteria update – 24 May 2024
While levels are improving, test results from Bay of Plenty Regional Council for the Ōhau Channel continue to show high levels of potentially toxic blue-green algae (Cyanobacteria). The local Medical Officer of Health urges people to avoid any activity which results in contact with the channel water.
These algal blooms have the capacity to release toxins into the water which can cause significant ill-health to anyone who has contact with the water. The toxins can affect the nervous system causing numbness and difficulty with breathing, and also causing asthma attacks. Contact with the water can also cause skin rashes, stomach upsets and visual problems.
As a precaution Health Warnings are still in place for the following locations:
- Ōhau Channel
- Ōkere Arm of Lake Rotoiti
- Upper reaches of the Kaituna River down to, and including, Trout Pool
- All of Lake Rotoehu
The warning for Lake Rotorua was lifted today (Friday 24 May 2024). Despite the lifting of the warning, the public should always be cautious for signs of algal blooms. Algal blooms can develop rapidly and unpredictably. If the water looks discoloured, has an unusual smell, or has green or brown particles suspended in it then it is best to avoid contact with it.
What you need to know:
- Keep yourself and your pets safe by avoiding all contact with affected water.
- If your household draws water for drinking, bathing or other uses please use an alternative water source until further notice. Boiling the water is not recommended.
- Levels of Cyanobacteria can change quickly so it is important to check health warnings, nearby signage and any visible signs of blue-green algae before coming into contact with the water.
- Do not take or consume trout that are found dead.
- Ensure that trout caught in the affected areas are thoroughly gutted and rinsed in clean tap water before eating.
- Do not eat shellfish or kōura from affected areas.
- Water activities including riverside fishing and duck shooting – it is advised to err on the side of caution until further notice.
If you have come into contact with affected water and have concerns about your health, please contact your GP or Healthline on 0800 611 116. In an emergency call 111.
Warning signage is in place at public spaces around the affected areas.
Further information:
- Toxic algae: www.toiteora.govt.nz/public/recreational-water
- List of up-to-date health warnings for the Bay of Plenty and Lakes districts: www.toiteora.govt.nz/health-warnings
More about Cyanobacteria from Toi Te Ora Public Health: