Calgary children have been without fluoride in their drinking water since 2011 and their dental health is suffering, according to findings from a University of Calgary study. It compares the dental health of children in Calgary to children in Edmonton, where the municipal water supply is fluoridated. Of the approximately 2,600 Grade 2 students in each city who took part in the study, 55.1 per cent of Edmonton participants had one or more cavities in their baby teeth. In comparison, the number was 64.8 per cent of Calgary children.