Water fluoridation: Water fluoridation is the process of adjusting the natural level of fluoride in the water supply to between 0.7 ppm and 1.0 ppm. This is the optimal amount that provides protection against tooth decay, and is recommended by the World Health Organization.
Data calculation/treatment
Please note results have not been adjusted for socio-economic status.
At URL provided, select '2024: Year 8 oral health data from the Community Oral Health Service [XLSX, 31 KB]'.
Some sheets were combined by Figure.NZ for processing purposes.
From the dataset Community Oral Health Service: Year 8 oral health data 2024, this data was extracted:
Sheet: Year 8
Range: C7:BV31
Provided: 1,512 data points
Dataset originally released on:
September 22, 2025
About this dataset
This dataset provides data from the Community Oral Health Service, containing statistics on the level of decayed, missing and filled teeth (dmft/DMFT) and percentage of children caries-free for Year 8 children. Data is organised by DHB and region, as well as ethnicity and fluoridation status.