Mapping the flow of finance to water security investments can identify the ultimate sources of capital, the level of investment and who are the different players at different stages as well as the different channels and vehicles to access investment in water security (e.g. green bonds). The study will also identify the sources of available finance in each country, to develop an assessment of financing capacity. This work could be extended to a broader range of countries. It is a well-recognised barrier to scaling up private sector investment across infrastructure sectors.