DEGRADATION OF GROUND WATER DUE TO FLOURIDE, RELATION TO FLUOROSIS IN HUMAN POPULATION AND DEFLUORIDATION TECHNOLOGIES
 
The presence of malady inflicting micro-organisms and/or excessive dissolved compounds and salts of fluorides, nitrates,metals like iron, arsenic, lead, chromium, mercury, cadmium, copper in surface and H2O sources ends up in contamination of potable drinking waters. Ground water is severely threatened by pollution owing to industrial wastes and excessive inputs of population. stream pollution is principally through industrial waste waters from paint, pigment, chrome and animal skin tanning, electroplating ,textile colouring andpulp and paper trade ,cotton textile , industry , ceramic industries ,galvinisation of iron product , ore mining . water is one in all the essential wants of life. it’s been determined that water could be a major supply of pollutants and contaminants that cause many ailments. sizable amount of individuals run the chance of suffering the adverse affects once water is unsafe to drink. United Nations agency (WHO) estimates indicate that eightieth percent  of the diseases are related to contaminated water The common diseases are dental and skeletal pathology and methaemoglobinemia infectious hepatitis, polio, typhoid, cholera, dysentery.
FLUOROSIS
Fluorosis could be a disabling unwellness touching nearly twenty five million population within the country. Fluorosis problem is wide unfold everywhere the country the endemic states area unit Andhara Pradesh, Karnataka, Tamil Nadu, Uttar Pradesh, Haryana, Punjab, Maharastra, Gujarat, Rajasthan, Jammu Kashmir, Delhi, Kerala. The fluoride distribution within the well water of varied cities of Rajasthan area unit shown in Figure 1&2 ,where halide exceeds one.5 mg\l permissible limit.
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The fluoride problem in Bihar is acute wherever around 30% districts have excess fluoride in ground water as per survey , these districts area unit Palamu ,Jamui, Gadhwa, Bhabhna, Rohtas, West Champaran, Gopalganj .Due to high high fluoride concentration in water most kids within the affected villages area unit are suffering dental fluorosis and an outsized range of adults are v with skeletal fluorosis.
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