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.

Waikirikiri/Selwyn River at Glentunnel

14 January 2022
 

Canterbury DHB’s Community and Public Health unit has extended the health warning for Waikirikiri/Selwyn River, now from SH77 bridge down past Glentunnel Camping Ground.

The warning follows finding moderate to high cover of potentially toxic algae (benthic cyanobacteria) in this area.

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 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.

Environment Canterbury continues to monitor the river on a regular basis.

Whakatipu/Twizel River at picnic area (upstream of state highway 8)

11 January 2022
 

South Canterbury District Health Board’s Community and Public Health unit has issued a health warning after moderate to high cover of potentially toxic algae (benthic cyanobacteria) was found in Whakatipu/Twizel river at picnic area (upstream of state highway 8).

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 Whakatipu/Twizel 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.

Environment Canterbury continues to monitor the river on a regular basis.