The Hamilton City Council has agreed on the wording for a referendum on fluoridation to be held in conjunction with the local body elections in October this year.
On Friday, the council voted in favour of holding the referendum, just weeks after deciding to stop adding fluoride to its water supply.
The issue came back to the council when a petition with more than 2000 signatures asking for a public vote was presented.
The referendum will simply ask people if they vote for or against having fluoride added to the water. The council says the result of the poll will not be binding.