Warnings and Alerts

Active warnings and alerts for Canterbury region

• 
  Phormidium - River cyanobacteria warnings

  10 MAY 2021 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 at Coes Ford Ashburton River (South Branch) at Hills Road Ashburton River at Boundary Road Ashburton River at Hāpua (river mouth) Ashburton River at S...
• 
  Lake Opuha cyanobacteria warning

  13 APR 2021 By ENVIRONMENT CANTERBURY

  Monitoring has identified a bloom of potentially toxic planktonic cyanobacteria algae in Lake Opuha near the dam. Community and Public Health have therefore issued a health warning and signage will be erected at that site. Once monitoring indicates that these locations are safe, the signs will be re...
• 
  Lake Pegasus cyanobacteria warning

  23 MAR 2021

  HEALTH WARNING UPDATE FROM CDHB (23 March 2021): Health warning issued for Lake Pegasus Canterbury District Health Board’s Community and Public Health unit has issued a health warning after evidence of potentially toxic blue-green algae (planktonic cyanobacteria) was found in Lake Pegasus. Evidence...
• 
  Advisory Note - Cyanobacteria

  5 MAR 2021 By CANTERBURY ADMIN EG

  Advisory Note: Caution – Cyanobacteria found on the Opihi River at Parke Road   Environment Canterbury has found increased growth of benthic cyanobacteria on the Opihi River at Parke Road. We advise the public to be vigilant around these rivers and avoid contact with water if black mats are prese...
• 
  Lake Forsyth cyanobacteria warning

  11 JAN 2021

  HEALTH WARNING (11 Jan 2021): Warning for Te Roto o Wairewa/Lake Forsyth. Potentially toxic blue-green algae (planktonic cyanobacteria) was found in Te Roto o Wairewa/Lake Forsyth. People and animals, particularly dogs, should avoid Te Wairewa/Lake Forsyth until further notice. For more infor...
• Swimmers Itch

  17 DEC 2020 By ENVIRONMENT CANTERBURY (EG)

  Swimmers Itch Swimmers itch, also known as ‘duck itch’ or cercarial dermatitis, is caused by exposure to tiny larvae or cercariae in shallow, warm water and can cause an allergic irritation of the skin.Symptoms can include an itchy or tingling sensation that develops into tiny red spots, pimple-lik...
• 
  Lake Ellesmere warning

  17 NOV 2020

  WARNING ISSUED 24/12/2017 - ONGOING BLOOMS Updated 17/11/2020 Canterbury District Health Board’s Community and Public Health unit has been advised by Environment Canterbury that the dominant species of potentially toxic blue-green algae (planktonic cyanobacteria) found in Lake Ellesmere (Te Waihor...