: News Article

Public Advised Against Using Black Weir

03/01/2003

Higher than normal levels of blue green algae found in Black Weir have prompted NQ Water to advise swimmers, skiers and other users to find alternative areas for recreation, for the time being.

NQ Water keeps an eye on blue green algae as part of its routine surveillance and monitoring program.

While the current level is well below the recommended guidelines, the public ought to be aware said Chief Executive Officer Ken Diehm.

"The level of blue green algae detected in Black Weir is not a public health risk by any means," Mr Diehm said.

"Under the right conditions, however, it can multiply very quickly."

"Even at low levels it can cause skin irritations, so we are advising people not to use the weir. We are working closely with the Department of Health and testing daily. We will keep the public informed of any developments."

Two species of algae were identified in Black Weir; one was measured at 1,900 cells/ml and the other at 3,200 cells/ml. This is well below the 20,000 cells/ml trigger point that authorities indicate is a danger to public safety, said Mr Diehm.

Blue green algae is naturally occurring in water ways and the incident could be part of a natural growth cycle or the result of the prolonged dry spell and the absence of flushing in the weirs, said Mr Diehm.

There was no sign of the algae in either Ross River or Paluma Dams, he said.

© 2003 NQ Water