Toxic algae warning issued for length of Canterbury's Ashley River
A health warning has been issued for the length of the Canterbury's Ashley/Rakahuri River after more toxic algae was found.
The Canterbury District Health Board (CDHB) says moderate to high cover of potentially toxic algae (benthic cyanobacteria) has been found along the river between the Okuku River Confluence to the State Highway 1 bridge.
A warning was already in place for the SH1 site, and while a warning was recently lifted for the Loburn-Rangiora site because it had become dry, new algae growth was already being seen there.
Canterbury medical officer of health Dr Ramon Pink says the algae looks like dark brown to black mats and can product toxins harmful to people and animals.
"Exposure may cause skin rashes, nausea, stomach cramps, tingling and numbness around the mouth and fingertips."
Anyone who experiences such symptoms should visit their doctor immediately, and animals showing signs of illness should be taken to a vet immediately.
Reticulated town water supplies are currently safe, but no-one should drink water from the river at any time, Pink said.
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Poll: Are you starting to feel a lift in business confidence across the Canterbury region?
The Press reports that Canterbury is right in the middle of a construction boom, with activity forecast to peak around 2027 and major investment flowing into transport, water and energy infrastructure.
We want to know: Are you starting to feel a lift in business confidence across the Canterbury region?
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42.4% Yes
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57.6% No
Poll: Do you set New Year’s resolutions?
🎉 2026 is almost here!
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Do you set resolutions, follow special traditions, or just go with the flow?
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10.3% Yes! New Year, New Me
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20% Yes - but I rarely stick to them
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69.8% Nah - not for me
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