For 50 years Americans, Canadians, etc., have been repeatedly warned not to drink or use fluoridated water for cooking.
I myself wouldn’t drink it, but he says it’s safe to drink.
You can’t get rid of fluorides by boiling tap water but you can kill bugs by boiling water from natural sources.
What the best way to get fluorides out of tap water?
Distillation is good. Distilled water is available in US supermarkets, but not so in Europe.
I heard reverse osmosis works but not perfectly.
If your city fluoridates tap water, never use it for cooking. Just use it for washing stuff. Showering should be OK.