Recent heavy rainfall in neighbouring Waipā and Ōtorohanga is now flowing through the Waikato district, affecting conditions in both the Waipaa and Waikato Rivers.
After significant storms, rivers can carry higher levels of sediment, runoff and debris. Conditions can change quickly, and water that may normally appear safe can pose health risks.
As a general precaution, we advise avoiding contact with rivers following storm events. This includes:
Swimming or wading
Fishing or gathering kai
Drinking untreated water
Health New Zealand advises that heavy rain can increase the risk of harmful germs and chemicals contaminating waterways. Silt and runoff may carry contaminants that can cause illness. Even accidental splashing during activities such as boating, kayaking or using a waka can pose a risk.
Flooding can also disturb cyanobacteria (toxic algae) mats, which sometimes sit on the river or lake bed. When disturbed, these mats can break apart, float to the surface or wash up on the edges, increasing the risk of exposure to toxins. Cyanobacteria can look like brown or black mats with foam on the water’s edge, and may smell musty. Avoid contact with water where these are present, and keep children and dogs away.
If you come into contact with river water:
Wash your hands thoroughly, especially before eating and after using the toilet
Seek medical advice if you feel unwell. You can contact your doctor, local health provider or call Healthline on 0800 611 116
If you rely on rainwater tanks for drinking water, check for cracks or damage following heavy rain that could allow contamination. Further advice is available from Taumata Arowai and Health New Zealand.
We are working closely with Waikato Regional Council, Health New Zealand - Waikato and emergency response partners coordinating through Ōtorohanga and Waipā to monitor river conditions. We will continue to provide updates as required.
