Thames to determine fluoridation by referendum in 2015 17 December 2014 Thames Ward voters will have a binding referendum in 2015 to determine whether or not their water supply will continue to have fluoride added. The decision, made by the Thames-Coromandel District Council at its final meeting for the year, fulfilled the expectation by many in the community that the full Council consider the matter again. The referendum will be held in the second half of 2015 with details of dates and costs to be worked out next year. A referendum is a form of poll where, in this case, those on the electoral role registered in the Thames Ward will be able to vote. The largest number of votes will determine the outcome. We will release more details next year when we have more information, but in the meantime, you can take a look at background information here.