Pure Drinking water is the basic need of every individual. However, this need is hardly met by many people in India. The water quality of natural resources is diminishing very fast and there is hardly any reservoir left unpolluted.
Contents of harmful pollutants have reached far beyond the permitted values in such reservoirs. This lead to many water borne diseases and ailments like Campylobacteriosis, Cryptosporidiosis, Escherichia coli Diarrhoea, Encephalitis, Gastroenteritis, Giardiasis, Hepatitis A, Leptospirosis, Methaemoglobinaemia, Poliomyelitis, Salmonellosis, Shigellosis, Paratyphoid Fever, Typhoid Fever, Yersiniosis, cholera and dysentery.
According to the studies more than 4,500 die every day from waterborne diseases.
Groundwater is still drinkable upto some extent as the pollutants do not reach underground water table. However, content of salts and dissolved solids varies from place to place. Due to this variation taste and usability of such water differs from one place to another. Very high as well as very low TDS is harmful for consumption. Whereas low TDS will gradually lower the intake of essential elements, high TDS water will show harmful effects on general health. Also, high and very low TDS imparts bad taste to water.
People are bound to drink high TDS water due to unavailability of requisite measures of improving the quality of drinking water.
Total Dissolved Solids (TDS) value is the direct measurement of quality of drinking water. According to World Health Organization [WHO], the quality standard of drinking water as follows in terms of TDS mg/lit:
- < 50 Unsuitable for drinking
- 80-140 Excellent with sweet taste
- 140-300 Good
- 300-500 Fair
- 500-900 Poor
- >900 Unacceptable
Extremely low TDS renders water unacceptable because of its flat, insipid taste. However, TDS range of 80-140mg/litre is the best range at which water tastes sweet and fulfills the all requirements of human body. This is why doctors generally recommend installing that RO system which gives the drinking water in 80-140 TDS range.