Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Potentially toxic algae found in the upper Tomahawk lagoon

March 27, 2014

Potentially toxic algae found in the upper Tomahawk lagoon

The latest weekly samples from Tomahawk Lagoon have shown high levels of the potentially toxic cyanobacteria (blue-green algae) in the upper lagoon.

The cyanobacteria can produce toxins which may cause illness, such as skin reactions, in people and animals.

Otago Regional Council director of engineering, hazards, and science Gavin Palmer said algae had been present throughout the summer, mostly at low levels. It was not possible to predict how long it would take to recede again.

“We are urging parents to keep their children out of the water and dog owners to do the same with their pets,” Dr Palmer said.

The presence of extensive algal blooms or cyanobacteria is linked to many factors, including high nutrient concentrations in the water and lake bed. Nutrients in the lake bed are released when strong winds stir up the sediment.

Dr Palmer said warning signs the council put up at the outlet of the lower lagoon had remained in place since the algae was recorded at high levels there in February.

Additional warning signs were now being installed adjacent to the upper lagoon. All warning signs would remain in place until monitoring showed the algal bloom had reduced and weekly samples were consistently below levels posing any threat to health.

Dr Palmer said ORC staff would continue to monitor the situation and update the public with developments.

Dr Palmer and ORC scientists have met Tomahawk community representatives to discuss the issue. A background paper will be prepared for the council’s consideration and following this, a public meeting will be organised to brief the community.

In the meantime, anyone wishing to join an ORC email list and receive the sampling weekly results should phone ORC customer services on 474 0827.

ENDS

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell:
On Anne Tolley’s
Callous Folly

Years ago, I remember someone in the Heath Ministry telling me off the record that regulatory oversight in this country largely consisted in ‘waiting for something to turn green or fall off somebody’ before the authorities would swing into action...

Last week’s conflict between Social Development Minister Anne Tolley and District Court judge Carolyn Henwood illustrated quite a few of the flaws in the system. More>>

 

Members’ Bills: Greens' Domestic Violence And Loans Bills Pulled From Ballot

Jan Logie’s Domestic Violence-Victims' Protection Bill introduces workplace protections for victims of domestic violence, including allowing victims to request paid domestic violence leave for up to 10 days... Gareth Hughes’ Bill allows Kiwis with student loans to defer their student loan repayments into a first home savings scheme. More>>

ALSO:

IPCA: Police Did Not 'Deliberately' Use Pepper Spray On 10-Year-Old

"When spraying the man, the officer did not properly consider the necessity of using pepper spray in a confined space, the likelihood that it would affect the other innocent passengers or the fact that he was using a more powerful spray." More>>

ALSO:

Donor Bill Passes: Full Income Compensation For Live Organ Donors

Unanimous cross-party support for the Compensation for Live Organ Donors Bill represents a critical step in reducing the burgeoning waiting list for kidney donations, according to Kidney Health New Zealand chief executive Max Reid. More>>

ALSO:

Earthquake Response: Emergency Legislation Prepared

Three new Bills have been drafted in the wake of the magnitude 7.8 earthquake on November 14 to ensure the government can enable affected communities to respond quickly and efficiently. More>>

ALSO:

Housing MPs: New Building(s) For Parliament

A new building will be erected on Parliament grounds to house Members of Parliament and their staff who currently work in leased accommodation in Bowen House. The plan has cross-Party support, apart from NZ First, said Parliament’s Speaker, Rt Hon David Carter. More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news