Warnings and Alerts

Active warnings and alerts for Canterbury region

• Advisory: Intermittent blue-green algae blooms in Lake Opuha

  27 MAY 2022 By ENVIRONMENT CANTERBURY

  “Scums of blue-green algae (planktonic cyanobacteria) have been observed to form intermittently in various locations in Lake Opuha. Contact with the water is not advised when scums are present. Contact with the scum may cause skin and eye irritation. Drinking or accidentally swallowing water may re...
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  Phormidium - River cyanobacteria warnings

  12 APR 2022 By ENVIRONMENT CANTERBURY

  HEALTH WARNING UPDATE ISSUED BY CDHB: River warnings are now in place for potentially toxic benthic algae (cyanobacteria) in the: Selwyn River/Waikirikiri at Glentunnel Camping Ground  Mats are detaching and have been observed accumulating along the river edges. There are also other access po...
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  Lake Forsyth cyanobacteria warning

  18 FEB 2022

  UPDATE (23 March 2022): Visible scums & bloom at Caton's Bay. The lake remains in warning. UPDATE (18 February 2022):  Health Warning  – Algal Bloom in Te Roto o Wairewa/ Lake Forsyth Canterbury DHB’s Community and Public Health unit has issued a health warning after potentially toxic blu...
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  Lake Ellesmere / Te Waihora cyanobacteria warning

  8 FEB 2022

  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 (Lake Ellesmere). People should avoid the Lake and animals, particularly dogs, should not be allowed near the wa...
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  Lake Pegasus cyanobacteria warning

  10 DEC 2021

  HEALTH WARNING UPDATE FROM CDHB (10 December 2021): Health warning issued for Lake Pegasus Canterbury DHB’s Community and Public Health unit has issued a health warning after potentially toxic blue-green algae (planktonic cyanobacteria) was found in Pegasus Lake. People should avoid the lake and a...