[1] Jimma University,Department of Environmental Health Science and Technology
[2] Research and Development Directorate,Department of Epidemiology and Biostatistics
[3] Ministry of Water,undefined
[4] Irrigation & Energy (MoWIE),undefined
[5] Water & Sanitation Program (WSP),undefined
[6] the World Bank,undefined
[7] Ethiopia Country Office,undefined
[8] University of California,undefined