Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answer updated 2 years ago

As far as it helps the public health, and does not harm people, then it is allowed and it might be recommended or even compulsory if the water is the aea is not suitable for drinking and it might harm public health before fluoridation. Obviously the percentage of the fluoride must be accurate.