Toxic algae bloom concentrated around the southern margins of Lake Tutira, on state highway 2 between Napier and Wairoa. Photo / Paul Taylor
Toxic algae bloom concentrated around the southern margins of Lake Tutira, on state highway 2 between Napier and Wairoa. Photo / Paul Taylor
Health warning over Lake Tutira has been extended following the detection of higher levels of cyanobacteria by the Hawke's Bay District Health Board.
People should not swim in the lake and avoid contact with the lake water, the DHB said. Some cyanobacteria species produce toxins (cyanotoxins) which pose a riskto humans and animals when consumed or by direct contact during recreational activities.
Medical Officer of Health Nicholas Jones said the Hawke's Bay Regional Council had found cyanobacteria in the lake in April and a warning was issued.
"This warning had not been lifted because testing continued to show the bloom comes and goes and recent testing confirmed high levels of the toxin."
Dr Jones said the DHB wanted to reinforce the warning because the bloom was becoming worse and more people may be tempted to use the lake as warmer weather sets over the region.
He also warned if people eat fish or shellfish from the lake they should avoid eating the gut and organs altogether as these parts of the fish accumulated toxins.
The DHB and regional council staff had agreed the lake needed to be classified as having "an ongoing risk".
"Testing can help us identify risk at a particular time but because cyanobacteria blooms come and go quickly at the lake DHB staff can't use the results to provide accurate advice to the public about cyanobacteria risk in between samples.
