Toxic algae warning for Wai-iti River

Tasman District Council has issued a warning due to toxic algae coverage in the Wai-iti River exceeding 20 per cent.

Signage has been put up at several locations around the Lower Waimea and Wai-iti Rivers, as well as Pigeon Valley Rd, to alert those travelling within the vicinity of the river.

The council is asking people to be vigilant.

“Familiarise yourself with what the toxic algae looks and feels like - particularly if you're a dog owner or a parent with toddlers.”

Toxic algae is black and forms gelatinous mats on the riverbed, but it 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.

The council advises people to put dogs on leads if any toxic algae is spotted.

“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.”

The council is continuing to monitor other river areas across the district over the summer and will update residents if algae is found elsewhere.