1. Department of Civil & Environmental Engineering, Stanford University, Y2E2 Building, 473 Via Ortega, Stanford, California 94305, United States
2. Environmental Interventions Unit, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), 68 Shaheed Tajuddin Ahmed Sarani, Mohakhali, Dhaka 1212, Bangladesh
3. Department of Economics, University of Dhaka, Dhaka 1000, Bangladesh
4. BRAC James P. Grant School of Public Health, BRAC University, 66 Mohakhali, Dhaka 1212, Bangladesh
5. Stanford Woods Institute for the Environment, Stanford University, Y2E2 Building, 473 Via Ortega, Stanford, California 94305, United States
6. Department of Civil & Environmental Engineering, Davis Hall, University of California, Berkeley, Berkeley, California 94720, United States