One of the key objectives of monitoring is to inform policy- and decision-making. To this end, it is important that the data are detailed enough to indicate where, when, how and at whom to target interventions. This calls for data that can be disaggregated spatially (which river is polluted?), temporally (in which season is wetland extent being recorded?) and by sector (which sector is using water and generating wastewater?). It may also be useful to separate indicators into their subcomponents, for example, the different aspects of integrated water resources management (IWRM) or the type of ecosystem.