Health warning removed for Waiau River at the Waiau township

Friday, 3 August 2012, 5:17 pm
Press Release: Canterbury District Health Board

DATE: August 3, 2012
SUBJECT: Health warning removed for Waiau River at the Waiau township

The Community and Public Health division of the Canterbury District Health Board has lifted its health warning issued in February this year for the Waiau River.

Recent surveys at the Waiau River site have shown the quantity of potentially toxic blue-green algae (benthic cyanobacteria) in the river has decreased to below levels harmful to public health.

Dr Alistair Humphrey, Canterbury Medical Officer of Health, says Environment Canterbury’s sampling of popular swimming spots will resume in the summer.

“The public will be informed if testing shows concentrations have increased and there is a risk to public health again,” Dr Humphrey says.

Facts about cyanobacteria:

• Appears as dark brown/black mats attached to rocks along the riverbed
• The algae occur naturally but can increase rapidly during warmer months
• It often has a strong musty smell and algal toxin concentrations can vary over short periods with changing environmental conditions
• Although high river levels will remove the algal bloom, detached mats can accumulate along the shore and increase the risk of exposure to toxins
• If a health warning is in place avoid contact with the water
• Although district or city councils may place warning signs, these may not be seen at the numerous river access points, hence the need for people/ dog-walkers to treat every low-flowing river cautiously.

For further information visit http://ecan.govt.nz/services/online-services/monitoring/swimming-water-quality/Pages/river-warnings.aspx

Or contact Community and Public Health on (03) 364 1777.

ENDS

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Canterbury DHB

CDHB

Canterbury District Health Board (CDHB) is a Christchurch, New Zealand based hospital and healthcare provider for the Canterbury region of New Zealand. Our region extends from Kekerengu in the North, to Rangitata in the South and Arthurs Pass in the West and comprises the six Territorial Local Authorities of Kaikoura, Hurunui, Waimakariri, Christchurch City, Selwyn and Ashburton.

We collaborate with other health and disability organisations, stakeholders and our community to decide what health and disability services are needed and how to best use the funding we receive from Government to improve, promote and protect the health, wellbeing and independence of our population.

At the Canterbury DHB, our vision is to improve the health and wellbeing of people living in Canterbury.

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