IJUMULANA, Julian1, BHATTACHARYA, Prosun2, AHMAD, Arslan3, LIGATE, Fanuel4, IRUNDE, Regina Filemon4, MTALO, Felix W.5 and KIMAMBO, Vivian6, (1)SEED, KTH Royal Institute of technology, Teknikringen 10B, Stockholm, 10044, SWEDEN; Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, Stockholm, 100 44, Sweden; Department of Water Resources Engineering, College of Engineering and Technology, University of Dar es Salaam, Dar es Salaam, Tanzania, United Republic of, (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)KTH-International Groundwater Arsenic Research Group, Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, Stockholm, SE-100 44, Sweden, (5)Department of Water Resources Engineering, College of Engineering and Technology, University of Dar es Salaam, Dar es Salaam, Tanzania, United Republic of, (6)KTH-International Groundwater Arsenic Research Group, Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, Stockholm, SE-100 44, Sweden; SEED, KTH Royal Institute of technology, Teknikringen 10B, Stockholm, 10044, SWEDEN