River warnings

We monitor more than 100 popular recreational sites in Canterbury during summer. Health warnings are placed at sites where an increased risk of cyanobacteria or faecal contamination is present. Advisory notes may be present but are not an official public health warning.

Cyanobacteria can occur in any waterway, at any time, so it is important that you know what it looks like. Find out more about cyanobacteria in waterways and how you can protect yourself and your animals.

Faecal contamination poses a risk to health, check out LAWA’s swim smart checklist, to know what to check before you swim.

Orari River at Parke Road

1 April 2021
 

Canterbury DHB’s Community and Public Health unit has issued a health warning for the Orari River at Parke Road.

The warning follows the finding of moderate cover of potentially toxic algae at the site.

Humans and animals, particularly dogs, should avoid these areas until the health warning has been lifted.

Environment Canterbury is monitoring the sites and the public will be advised of any changes.

 

Hakatere/Ashburton River at State Highway 1

31 March 2021
 

Canterbury DHB’s Community and Public Health unit has issued a health warning for the Hakatere/Ashburton River at State Highway 1.

The warning follows the finding of moderate to high cover of potentially toxic algae (benthic cyanobacteria) at this site.

People should avoid the area and animals, particularly dogs, should not be allowed near the water until the health warning has been lifted.

There are also other access points along the Hakatere/Ashburton River that may have benthic cyanobacteria present. People are advised to treat every low-flowing river cautiously, check for the presence of benthic cyanobacteria and avoid contact.

 

Opihi River at Raincliff

13 March 2021
 

Canterbury DHB’s Community and Public Health unit has issued a health warning for the Opihi River at Raincliff.

The warning follows a finding of moderate cover of potentially toxic benthic cyanobacteria algae at the site.

All people are advised to avoid the area and animals, particularly dogs, should not be allowed near the water until the health warning has been lifted. 

There are also access points along the Opihi River that may have cyanobacteria present and people are advised to check for the presence of cyanobacteria and avoid contact.

People should not drink the water from the river at any time, even after boiling, and should animals come into contact with contaminated rivers, they should be taken to the vet immediately. 

 

Waikirikiri/Selwyn River at Coes Ford

25 January 2021
 

Canterbury DHB’s Community and Public Health unit has issued a health warning for Waikirikiri/Selwyn River at Coes Ford.

The warning follows finding moderate to high cover of potentially toxic algae (benthic cyanobacteria) at the site.

People should avoid the area and animals, particularly dogs, should not be allowed near the water until the health warning has been lifted. There are also other access points along the Waikirikiri/Selwyn River at Chamberlains Ford that may have benthic cyanobacteria present.

People are advised to treat every low-flowing river cautiously, check for the presence of benthic cyanobacteria and avoid contact.