Monday 10 February 2020Media release2 minutes to read
Canterbury District Health Board’s Community and Public Health unit has lifted its algal bloom health warning issued for the Ashley/Rakahuri River at the Rangiora-Loburn Bridge (also called the Cones Road Bridge). This was issued on 6 January 2020.
Recent cyanobacteria surveys of the Ashley/Rakahuri River at the Rangiora-Loburn Bridge has shown the cover of potentially toxic algae (benthic cyanobacteria) in the river has decreased and is now below a threshold that was of concern to public health. This rapid decrease in cover is due to the intermittent flows at this site.
Canterbury Medical Officer of Health Dr Alistair Humphrey says Environment Canterbury’s sampling of the Ashley/Rakahuri River at the Rangiora-Loburn Bridge will continue to the end of March and then will resume at the beginning of next summer when there is increased likelihood of cyanobacteria growth.
A health warning remains in place for the Ashely/Rakahuri River at SH1.
Facts about cyanobateria:
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Page last updated: 30 July 2020
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