(Photo Courtesy: www.environment.nationalgeographic.com)
These standards have been specifically developed for Indian conditions and match global norms.
Statistics compiled by the United Nations (UN) show that over one lakh people die of water-borne diseases annually in India.
It is reported that groundwater in one-third of India's 600 districts is not fit for drinking as the concentration of fluoride, iron, salinity and arsenic exceeds the tolerance levels.
About 65 million people have been suffering from fluorosis, a crippling disease due to high amount of fluoride and five million are suffering from arsenicosis in West Bengal alone, due to high amount of arsenic.
The World Bank estimates 21% of communicable diseases in India are water related.