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The World Health Organization’s drinking water quality Guideline Value for fluoride is 1.5 mg / litre (WHO, 1993).

WHO emphasises that in setting national standards for fluoride it is particularly important to consider climatic conditions, volumes of water intake, and intake of fluoride from other sources (e.g. food and air).

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Einstein:

Not everything that can be counted counts, and not everything that counts can be counted.

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