SHARMA, Sanjeev1, BHATTACHARYA, Prosun2, AHMAD, Arslan3, VON BRÖMSSEN, Mattias4, AHMED, Kazi Matin5, ALAM, M. Jahid6, ISLAM, Md Tahmidul7, AKTER, Nargis6 and BASAK, Soumyajit8, (1)ExcelDots AB, Svartviksslingan 90, LGH 1302, Stockholm, SE-16739, SWEDEN, (2)Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, Stockholm, SE-100 44, SWEDEN, (3)Department of Earth and Environmental Sciences, University of Kentucky, 101 Slone Building, Lexington, KY 40506-0053, (4)Ramböll Sweden AB, Krukmakargatan 21, Stockholm, 104 62, Sweden, (5)Department of Geology, University of Dhaka, Dhaka, 1000, Bangladesh, (6)WASH Section, UNICEF Bangladesh, Sher-E-Bangla Nagar, Dhaka, 1207, Bangladesh, (7)KTH-International Groundwater Arsenic Research Group, Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, Stockholm, 11428, SWEDEN, (8)ExcelDots AB, Svartviksslingan 90, LGH 1302, Stockholm, 16739, SWEDEN