Toxic algae coverage in the Wai-iti River has now exceeded 20 per cent, so it's time to remind everyone to be aware of its presence and the risk to dogs and potentially those playing in the river if they are not careful to avoid it.
Signage has been put up at several locations around the Lower Waimea and Wai-iti Rivers, as well as Pigeon Valley Road, to alert those travelling within the vicinity of the river.
Please be vigilant and familiarise yourself with what the toxic algae looks and feels like - particularly if you're a dog owner or a parent with toddlers.
This alga is natural and occurs during extended periods of low flow in rivers. It is black and forms gelatinous mats on the riverbed.
It starts as mats on the bed of the river, particularly in the riffles but can become detached and accumulate at the shoulders of the river and around debris on the banks after long periods of low flow.
It can also have a distinctive musty smell which is attractive to dogs. However, it is usually only a problem if the dog eats it.
If you do see any of this algae, it would be wise to put your dog on a lead, and we strongly advise preventing your dog from scavenging, or playing in or near the water if the alga is present.
If you, your dog or other animals are sick after being in or near the affected river, consult your doctor or vet immediately.
We are continuing to monitor other river areas across the district over summer and will update if algae is found elsewhere.
See more information about toxic algae: https://bit.ly/3Rm4f8o(external link)