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Contamination of groundwater, symptoms and effect of fluoride on health, fluorosis_A look at fluoride in water
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Fluoride in Water
Surface Water
Is what you see in rivers, lakes, streams etc.
Groundwater is water that is found in aquifers below the surface of the Earth. To get groundwater, one must dig wells or borewells.
Groundwater
Water pollution of surface water bodies is visible in many places
But is groundwater clean?
When water seeps into the ground, it dissolves different substances depending on the type of soil and rock that it flows through.
Groundwater can get polluted naturally
Some of these substances like fluoride compounds can be harmful to health, if amounts greater than permissible limits are ingested over
long periods of time.
Natural pollution is a non-point source of pollution
The Bureau of Indian Standards states that in drinking water, fluoride levels are
0 0.5 mg/l
1.0 mg/l
1.5 mg/l
2.0 mg/l
Desirable
Permissible
Fluoride
• Low levels of fluoride in drinking water (0.5 to 1 mg/l) protect against dental caries
• High levels of fluoride in drinking water (above 1.5 mg/l) will lead to adverse health impacts ranging from dental fluorosis to skeletal fluorosis
• Fluoride levels in water beyond desirable / permissible limits is typically found in groundwater and not surface water
Fluorosis
©Ruhani Kaur/UNICEF India http://www.fannz.org.nz
19 states in India have groundwater that is rich in fluoride
Dental FluorosisSkeletal Fluorosis
Excess fluoride in the body (above 1.5 – 2 ppm)
Other symptoms
• Fatigue• Low hemoglobin count• Irritation • Loss of appetite• Excessive thirst and urination• Miscarriage• Inability to conceive due to defective sperm• Depression
Impacts of skeletal fluorosis
• Loss of livelihood since affected persons cannot work
• Loss of income • High medical costs• Poverty• Social outcasts since facilities for the
handicapped are lacking in India
Fluoride levels in groundwater are higher than permissible limits in 19 states of India
Over 6.6 crore Indians are affected by fluorosis
Mild fluorosis
Moderate/severe fluorosis
What can be done?
Where fluoride in water is between 1.5 to 2.0mg/l, avoid:
Canned fish
Dental products such asfluoridated toothpaste & mouth wash
Products containing black salt (kalanamak)
Eat more of fruits and vegetables rich in Vitamin C, Iron and Calcium
OrangeLemonGuavaGooseberry (Amla)TomatoGrapefruitAlmonds
AppleBrinjal
BananaBeetrootSpinach
Coriander leaves
In all fluoride affected areas, recharge the groundwater with rainwater
Harvest rainwater
Recharge groundwater
Thank you!