Wednesday 27 January 2021Media release2 minutes to read
Canterbury DHB’s Community and Public Health unit has lifted its algal bloom health warning issued for Lake Clearwater, Ashburton on 21 December 2020.
Recent water testing at Lake Clearwater show that the planktonic cyanobacteria (blue-green algae) currently found in the lake do not produce the common cyanobacteria toxins. The dominant cyanobacteria in Lake Clearwater has therefore been temporarily re-classified as non-toxic.
The total concentration of cyanobacteria in the Lake also presents a low risk to public health at current levels.
Canterbury Medical Officer of Health Dr Ramon Pink says Environment Canterbury’s sampling of Lake Clearwater will continue on a weekly basis to ensure the safety of the public.
“The public will be informed if testing shows that concentrations have increased and toxin-producing cyanobacteria occur and there is increased risk to public health again,” Dr Pink says.
Facts about cyanobacteria:
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Page last updated: 19 August 2021
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