We want to provide the best information and advice about water quality and safety to keep the public aware of the state of our rivers. This requires regular testing, monitoring and updates.
The Wai-iti River is subject to algae/cyanobacteria growth every summer and the extent varies depending on the rainfall volumes and timings.
This brings a reminder of the risk of algae to dogs and potentially those playing in the river if they are not careful to avoid it.
We have started our sampling of the Wai-iti River and will continue the sampling weekly. We found the coverage of toxic algae to be 7.5% at Waimea West Road on 2 December.
While this is still a relatively low risk, people should be exercising caution and avoiding letting their dogs loose. The mats of algae were also starting to detach and build up along the river’s edge. This is when toxin production is more likely.
You can find toxic algae monitoring results here.(external link)
With the first season of a fully operational Waimea Community Dam, there will be some aspects to consider in learning to manage the dam’s impact on the river – this includes changes to river flow with impounded water likely to differ from a natural flow.
Together with any water releases from the dam, there will also be occasional flushing flows downstream from the dam. It’s important to let everyone know that while these releases will help maintain the health of the Waimea River, any rise in river level will be minimal and will not pose a safety risk for those using the river.
While we expect some coloured water at times, we will nonetheless have a secure river flow to enjoy.