Michael Ashford, Lance Morrell, and Owen Scott provide a three-step approach for donors to recommit themselves to support governments, due to a large financing gap in causes that address water and sanitation needs in low- and middle-income countries. The international development community must more effectively use limited concessional financing to encourage private financiers to begin to provide commercial financing to the WASH sector and enable governments to identify and mitigate the risks in lending to the sector.
https://www.chemonics.com/blog/what-is-needed-to-mobilize-commercial-finance-for-the-water-sector/