Warnings and Alerts

HEALTH WARNING UPDATE ISSUED BY THE NATIONAL PUBLIC HEALTH SERVICE The National Public Health Service have issued a health warnings for toxic algae. The warnings follow detection of moderate to high cover of toxic algae (benthic cyanobacteria) in the:  Waihao River at Gum Tree Flat Rd (Don'...

Update March 2024: Due to the high biomass of cyanobacteria in the lake the health warning is still current. 8 February 2022 to date 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 Waiho...

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 regular...

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 wi...