Opposition Lib Dem councillors have today condemned senior Labour councillors for moving ahead with proposals to fluoridate Hull's drinking water.
The Lib Dems in Hull have long opposed fluoridation and called for better use of targeted education programmes instead.
The full costs of fluoridation are unknown, with senior Labour councillor Alan Clark, calling it a 'blank cheque'.
At the same meeting it was reported that the Council currently has a potential overspend running into millions of pounds in its finances.
Councillor Mike Ross, Leader of Hull Lib Dems said: "We are calling on Labour councillors to drop their fluoridation proposals and instead invest more in dental health education.
"No one knows how much fluoridation will cost, but it is estimated the implementation costs alone could be as high as £2.2million, with £330,000 annual running costs.
"Even a Labour councillor called the plan a 'blank cheque' proposal.
"These fluoridation proposals should be dropped now and more done to help those who need the help most."