Consuming excess fluoride through drinking water often leads to
skeletal fluorosis, causing debilitating bone structure disease, as well as
discoloration and mottling of teeth, cancer or adverse effects on the
brain and kidney [11]. Itwas estimated that globally more than 70 million
people are suffering from fluorosis. World Health Organization (WHO)
has set the safe limit of fluoride concentration in drinking water as
1.5 mg L−1.