(B) Arsenic groundwater contamination status in Bangladesh
Out of 20 incidents
of groundwater arsenic contamination in worldwide, the magnitude is considered
highest in Bangladesh. We began our work in Bangladesh during 1995. At
that time we had identified only 3 affected villages in 2 police stations
of 2 districts. Our current data shows arsenic level above 50 µg/l
in 2000 villages, 178 police stations of 50 affected districts in Bangladesh.
We have so far analyzed 34000 hand tube-well water samples from Bangladesh by FI-HG-AAS, of which 56% contained arsenic above 10 µg/l and 37% arsenic above 50 µg/l. Our estimation shows at least 25 million people are drinking arsenic contaminated water in Bangladesh. British Geological Survey (BGS) estimated that 35 million people in Bangladesh are at present drinking water contaminated with arsenic above 50 µg/l. So far we have 18841 people had been screened in Bangladesh from 244 villages and 19.8% have been registered with arsenical skin lesions.
Table 1: Present Arsenic Groundwater Contamination Status in Bangladesh