Christchurch City Council doesn't want to pay $63 million to put fluoride in its water supply and is looking for alternatives.
Fifty different water sources would have to be treated if the city is directed to fluoridate - instead of just one or two sources like most regions - creating a huge price tag.
Dental health experts say despite the larger cost, Christchurch City Council should not be exempt.
Te Whatu Ora Waitaha dental public health specialist Martin Lee spoke to Morning Report.
