Map of Fluoridated and Naturally Fluoridated Areas of England

The map which is accessible via the link below has been produced by the British Fluoridation Society.  It's 7 years out of date because it still includes Bedford Borough and parts of Central Bedfordshire as being fluoridated, which they are not.

Naturally fluoride areas have calcium fluoride or magnesium fluoride in raw and treated water.  Neither are as toxic as hexafluorosilicic acid.  Nevertheless, it is not desirable to have them in drinking water.