17 Mar 2018

Toxic algae in Selwyn/Waikirikiri River

1:05 pm on 17 March 2018

People are being warned to avoid parts of the Selwyn River, Waikirikiri, in Canterbury, where potentially toxic algae has been found.

Phormidium is a type of toxic cyanobacteria.

Toxic algae close up under a microscope Photo: Waikato Regional Council

Canterbury District Health Board said people should avoid the Chamberlains Ford area until further notice, and dogs should be kept away too.

Medical officer of health Ramon Pink said the algae looked like dark brown to black mats.

Environment Canterbury is monitoring the sites.