The map inFig. 1, for example, shows the spatial distribution of improved water sources in Homa Bay, and highlights the issues of functionality and seasonality. It is observed that the majority of audited
sources were found operational and with no seasonality problems
(71%), despite regional disparities. If such point-based information is
combined with demographic data and the source:man ratio cited
above, a coverage density map can be developed (Fig. 2)toshowaccessibility rather than availability aspects. It may be gleaned from the map
that, on average, only 8.7% of population are properly served by functional and year-round improved waterpoints, i.e. the percentage of