TOXIC ALGAE WARNING – Lake Wairarapa Moana
Toxic algae (cyanobacteria) has been found in these areas:
📍 Western Lake Reserve – High levels, avoid contact
📍 Domain Reserve – Elevated levels, caution advised
Toxic algae in lakes looks a lot different to what we usually see in rivers during summer. In lakes it can be identified by its bright green, scum-like appearance which collects at the water’s edge. Strong winds can also cause the scum to move around the lake edges.
It can cause potential illness if water is swallowed, inhaled, or by direct contact with skin—posing risks to dogs and people, especially children, pregnant people, and the elderly.
How to stay safe:
❌ Avoid contact with water, especially near green scum.
❌ Do not collect or eat shellfish.
🐟 Gut and clean fish properly, safely disposing of guts so animals cannot scavenge them.
🐶 Keep dogs on a leash and away from the water. Do not let them fetch sticks found near the water.
What to do if exposed:
📞 Call Healthline (0800 611 116) or visit a doctor if you have symptoms such as nausea, skin irritation, breathing difficulties or numbness around mouth and/or fingertips.
🐶Take dogs to a vet immediately if showing signs of lethargy, excessive panting, tremors, or seizures.
For more information visit: https://www.lawa.org.nz/.../can-i-swim-here/toxic-algae
Wairarapa Moana has been a taonga (treasure) for hundreds of years, acknowledged by local Māori as a place of tremendous cultural and spiritual value.
The once abundant waters teemed with life. Today, a fragile and unique ecology remains. Despite changes to the natural environment, it’s still a hot spot and migratory pathway for many important and threatened species.
Explore The moana
The area includes Lakes Wairarapa and Ōnoke, their neighbouring wetlands, the Wairarapa Lake Shore Scenic Reserve and Ōnoke Spit.
Protecting our treasure
The Wairarapa Moana Wetlands Project is a collaboration between local groups and organisations. The vision is Whakaora te repo, ka ora te taonga wai – Restoring our wetland treasure.