Parts of Lake Tarawera on amber alert; caution urged

Test results on possible algal blooms and discolouration affecting parts of Lake Tarawera have returned at an amber level.

Earlier this week Lake Tarawera users were being urged to be vigilant, following reports of possible algal blooms and water discolouration.

The Bay of Plenty Regional Council said it had received a number of reports of possible blooms and discolouration affecting parts of the lake, including the Wairua Arm (near Hotwater Beach) and the area around the campsite at the outflow of the lake.

Algal blooms can be caused by potentially toxic cyanobacteria (also known as blue-green algae).

A spokeswoman for the council said today the advice issued for the public to be cautious about recreational use at the area still stood.

"The [test] results have returned as amber level which means that there will be regular sampling."

If the water looks discoloured, has an unusual odour or visible algae were present, it is best to avoid any contact with the water and swim somewhere else.

Water should also not be taken for drinking purposes from any part of the lake that looks like it may be affected by algal blooms or is discoloured.

For more information about cyanobacteria blooms and health see this Public Health Service advice.