Monday 20 January 2025Media release3 minutes to read
Health Warning – Algal Bloom in Rakahuri | Ashley River at SH1
Health New Zealand | Te Whatu Ora has issued a health warning for Rakahuri | Ashley River at SH1.
The warning follows finding moderate to high cover of potentially toxic algae (benthic cyanobacteria) in the Rakahuri | Ashley River at SH1.
People should avoid the area and animals, particularly dogs, should not be allowed near the water until the health warning has been lifted.
There are also other access points along the Rakahuri | Ashley River that may have benthic cyanobacteria present. People are advised to treat every low-flowing river cautiously, check for the presence of benthic cyanobacteria and avoid contact.
Dr Annabel Begg, Public Health Medicine Specialist for the National Public Health Service, says the algae look like dark brown to black mats and can produce toxins harmful to people and animals.
“Exposure may cause skin rashes, nausea, stomach cramps, tingling and numbness around the mouth and fingertips.”
“If you experience any of these symptoms, seek medical advice urgently and let your healthcare provider know you’ve had contact with dark brown/black algal mats or water in this area”, Dr Begg says.
Pets that show signs of illness after coming into contact with algal mats should be taken to a vet immediately.
People and animals should remain out of the waterways until the warnings have been lifted.
Environment Canterbury is monitoring the sites and the public will be advised of any changes in water quality.
For further details visit: https://www.lawa.org.nz/explore-data/canterbury-region/
Or contact Te Mana Ora | Community and Public Health on (03) 364 1777:
https://www.cph.co.nz/your-health/recreational-water/
For more information about Mahinga Kai:
https://www.cph.co.nz/wp-content/uploads/saf0112.pdf
ENDS
For further information, contact:
Karen Berry
Public Health Communications Lead, Te Waipounamu
National Public Health Service
Health New Zealand – Te Whatu Ora
021 139 7442
Page last updated: 20 January 2025
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