Firefighters were still at Taupō district's main landfill on Sunday, more than 36 hours after a fire broke out.
The fire was first spotted overnight on Friday. A rescue helicopter flying overhead raised the alarm.
A Fire and Emergency media spokeswoman said about midday on Sunday four trucks were still on site managing hotspots.
She said a helicopter was used on Saturday but reported it was no longer needed for aerial drops as of 7pm that night.
At 1am on Sunday, firefighters at the scene reported they were dousing hotspots.