Christchurch Mayor Lianne Dalziel wants excessive water charges back on the table for the city's long term plans.
Councillors narrowly dumped water charges in July for fears it would be unfair and hit low-income families.
A council spokeswoman said Dalziel favours a proper debate about the funding of water delivery and mechanisms for watering gardens at peak times.
This could involve charges - but not for routine water use.