Warnings and Alerts

Long term water testing indicates that there is a regular bloom of the potentially toxic cyanobacteria Anabaena and/or Microcystis present. There is a permanent health warning advising people to avoid contact with water at this lake. Environment Canterbury continues to monitor the lake on a regula...

Update 28th April 2023: The warning is still in place due to the continued presence of cyanobacterial scums. Issued: 1 March 2023 Health Warning – Algal Bloom in Lake Opuha Te Mana Ora | Community and Public Health has issued a health warning after potentially toxic algae scums (planktonic cyanob...

Permanent Health Warning for Algal Bloom at Mata Kopae/St Anne’s Lagoon. Issued: 7 July 2022 Long term water testing indicates that potentially toxic cyanobacteria bloom periodically in Mata Kopae/St Anne’s Lagoon. There is a permanent health warning advising people (and animals) to avoid contact...

Update April 2023: Due to the high biomass of cyanobacteria in the lake the health warning is still current. 8 February 2022 Canterbury DHB’s Community and Public Health unit has issued a health warning after potentially toxic blue-green algae (planktonic cyanobacteria) was found in Te Waihora (La...