Auckland Council says although kauri dieback disease is prevalent in its regional forests including Northland, it's slowing down in other areas.
The Kauri Dieback Management Programme has just completed its second round of monitoring to determine the extent of the disease in North Island forests.
It says although kauri dieback is killing many trees in Auckland and Northland, tests have confirmed that most of the kauri forests south of Tamaki Makaurau are still healthy and remain disease free for now.
Council reports show that 11% of kauri forests in the Waitakere Ranges are affected by the disease, while those in the Hunua Ranges, Coromandel, Waikato and Bay of Plenty remain unaffected.
The kauri dieback management programme says it's continually working with tangata whenua and other Government agencies to combat the serious threat to keep the trees healthy for future generations to enjoy.