The country’s first tannery unit was set up in Narayanganj District in the 1940s, namely the ‘Dhaka tannery’. It was later shifted to Hazaribagh (a densely populated residential area of Dhaka) around 1950. Tanneries in Bangladesh are largely export oriented and has been ranked as the 5th most polluting industry of the world by the Blacksmith Institute’s report in 2010. There are about 185 tannery industries are operating in Hazaribagh. Every day, the tanneries collectively dump 22,000 cubic litre of toxic wastes including cancer causing hexavalent chromium into Buriganga. This industrial cluster is affecting 160,000 inhabitants, 12000 workers and has virtually killed the Buriganga (which could be a source of potable water for the 1.6 crore city dwellers) through its extremely hazardous operation. Due to the death of the Buriganga River, water supply in Dhaka has become totally dependent on groundwater that again is depleting at an alarming rate.