Photo: SuppliedThe Canterbury District Health Board has lifted its algal bloom health warning for the Ashley/Rakahuri River at the Rangiora-Loburn Bridge. The warning was issued on January 6 after potentially toxic algae (benthic cyanobacteria) was found in the river. "This rapid decrease in cover is due to the intermittent flows at this site," Canterbury Medical Officer of Health Alistair Humphrey says. "Environment Canterbury’s sampling of the river at the Rangiora-Loburn Bridge will continue to the end of March and then 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 State Highway 1.

Source: Otago Daily Times February 10, 2020 02:48 UTC