There is currently a red toxic algae warning in place at Ruamahanga River at Double Bridges, and Ruamahanga River at Te Ore Ore reaches due to high levels of toxic algae being observed. The presence of detached mats has also been observed.
These detached mats tend to accumulate on the river edges, making toxic algae easily accessible and representing the highest risk to young children and dogs.
We recommend no swimming and keeping dogs away from this part of the river until further notice. Toxic algae represents a very real risk to human and animal health.
If you have been in contact with toxic algae and are feeling unwell ring Healthline 0800 611 116. If you think your dog has swallowed toxic algae, take it to the nearest vet IMMEDIATELY. Symptoms in dogs can include lethargy, muscle tremors, fast breathing, twitching, paralysis or convulsions.
To remind yourself what toxic algae looks like see Land, Air, Water Aotearoa (LAWA) - Toxic algae in freshwater. Know how to spot toxic algae so you can avoid it if you see it. It typically grows as black 'leathery' mats on the river rocks in the water. Mats may detach from rocks and wash up on the water line.