Fig. 1
From: Assessing the water quality hazard and challenges to achieving the freshwater goal in Sri Lanka
Location map of Sri Lanka showing population and drinking water sources. a distribution of gridded population density map (i.e., persons per square kilometer) across Sri Lanka for the year 2020 (data source: WorldPop, https://www.worldpop.org/). b map showing district-wise distribution of drinking water sources according to Sri Lanka’s 2012 Census of Population and Housing. The number of various drinking water sources (i.e., protected well, tap water and surface water supplies) is normalized by the number of households in each district (n = 25) in the country to show relative proportion of these water provisions. Note that tap water in Sri Lanka can be sourced from either treated surface water or groundwater. Both maps are produced in ArcGIS Desktop (v.10.8) software.
