Are you inside one of those fluoridation zones, or outside of the UK entirely? If not, you might not have anything to worry about. You could always try writing to your local council. Like I said it's not something which concerns me overly, but I wouldn't be voting *for* fluoridation - beneficial or not, I believe people should be given a choice, and there are always supplements if people feel they need them.
I'm not sure about potential health effects through showering - fluorides shouldn't be present in the vapour, but I guess the water mist would contain some and could be inhaled. Still, the amounts should be even more tiny than those ingested through drinking water, unless inhalation is somehow a more harmful route?
That's a different issue - legionella. If you don't run hot enough water through the shower head then bacteria can build up, turn it on in the morning and you can get a fine mist of them in the first burst - breathe in this mist and you can develop legionnaires. Easy to prevent with hot enough water, shower head cleaning and just not breathing a lung full of the vapour when you turn the shower on in the morning.
I thought he meant on the subject of fluoride.
Legionella can form in stationary water, so running unused taps occasionally is a recommended preventative measure. Warm shower water isn't hot enough to bother legionella - people shower with 40C to maybe high forties, at least 60 would be needed to kill the bacteria, 70 to do it effectively i.e. well past the scalding range.
Chrorine present in tap water can help too, as can getting rid of any unnecessary water storage tanks.
Fluoride is an ion, ionic compounds disassociate in solution. Fluoride as part of sodium fluoride (what you mean by SaF?) or calcium fluoride, is still fluoride.
Sa used to be used for samarium (now Sm) so maybe he meant that? Though Samarium would form SmF3 rather than SmF, so I guess he meant sodium fluoride (NaF).
Either way water fluoridation is usually Hexafluorosilicic acid (H2SiF6) not sodium fluoride anyway.
And as watercooled rightly points out, in solution it doesn't really matter. Calcium fluoride is insoluble so there is effectively none in the water, for fluoride to leech out of calcium fluoride minerals there has to be a reaction with the water whereby the calcium reacts with another ion in the water leaving fluoride ions in solution.
The mist wouldn't be though.
That seems a bit extreme.
Was it some crazy water shortage campaign or something?
Ah, I thought you were being serious! xD
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