Fluorine is the 13th most abundant element available only in the earth crust. As the ground water passes through the fluoride rich rocks it carries fluoride with it, hence most of the fluoride is found in ground water than surface water. Fluoride has been shown to cause significant effect on human health through drinking water. Different forms of fluoride exposure are of importance and have shown to affect its body content and thus increasing risk of fluoride prone disease. It has a beneficial effect on teeth by preventing and reducing the risk of tooth decay. In fact, concentrations lower than 0.5mg/L intensify risk of tooth decay. However, higher concentration (more than 1.5 – 2mg/L) fluoride becomes quite detrimental to health. Excessive ingestion causes dental fluorosis as well as skeletal fluorosis and osteoporosis as a result.
Link : http://www.indiawaterportal.org/sites/indiawaterportal.org/files/fluorosis_report.pdf
Link : http://www.indiawaterportal.org/sites/indiawaterportal.org/files/fluorosis_report.pdf
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