> They've stopped fluoridating their water in Scandinavia for years now.
Note that Scandinavia has naturally high fluorine levels in their groundwater:
> In Sweden, fluoride concentrations in drinking water from water treatment plants have been reported to mostly range between 0 and 1.5 mg/L, with a maximum level of 4.1 mg/L, while in private wells in South-Eastern Sweden, it was found that 24% out of about 4,800 wells exceed 1.5 mg/L. In Norway, a study from 2017 found that 4 of 201 waterworks had fluoride concentrations exceeding guideline value of 1.5 mg F/L. In a study from Western Norway, the fluoride concentration in selected wells ranged from 0.51 to 8.0 mg F/L, and drinking water was the only dietary variable associated with increased risk of dental fluorosis. In Denmark, analyses of drinking water show most sources being low and below 1.5 mg F/L.
Note that Scandinavia has naturally high fluorine levels in their groundwater:
> In Sweden, fluoride concentrations in drinking water from water treatment plants have been reported to mostly range between 0 and 1.5 mg/L, with a maximum level of 4.1 mg/L, while in private wells in South-Eastern Sweden, it was found that 24% out of about 4,800 wells exceed 1.5 mg/L. In Norway, a study from 2017 found that 4 of 201 waterworks had fluoride concentrations exceeding guideline value of 1.5 mg F/L. In a study from Western Norway, the fluoride concentration in selected wells ranged from 0.51 to 8.0 mg F/L, and drinking water was the only dietary variable associated with increased risk of dental fluorosis. In Denmark, analyses of drinking water show most sources being low and below 1.5 mg F/L.
https://pmc.ncbi.nlm.nih.gov/articles/PMC10770722/
The US targets 0.7 mg/L.
Many European countries also choose to add fluorine to milk and/or salt instead of water.