Unfortunately it appeared the tree had been poisoned, Bainbridge said. It was showing some signs of decline.
Council arboriculture officer Claire Lilley had looked at it recently, and said it was in no immediate danger of falling.
"Norfolk Pines are renowned for being very stable in windy conditions."
The two would prefer the tree to stay for now. Lilley will monitor it for the next six months and take action if required, the letter said.
In other streetside activism, Painting has asked for a shelter at the bus stop outside her house. She said it was a low-income area, and children waiting for the bus did not have raincoats.
"It gets me, standing here watching these kids getting soaked every morning."
She's been told Horizons Regional Council will be happy to install a shelter there, after Whanganui District Council has gone through a consultation process.
"We have already asked the council to proceed with the consultation process, unfortunately we can't put a timeframe to this although once it has been passed will get the shelter installed as soon as we can," Horizons' transport officer Denise Webber wrote.