The 30 MAR communities that are ready to roll out intervention (access to MAR water to the community) are located in rural areas in the three districts and 20 MAR communities which can be reached most effectively based on geographical location will be selected. Water samples from the selected 20 MAR sites will be collected every month for one year from June, 2016 to May, 2017 to capture the seasonal variation of microbiological and chemical water quality. Human health data and biological specimens from the enrolled participants from within the catchment area of the selected 20 sites will be collected from December, 2016 to May, 2017.