The Grameen Principle founded on the notion that loans are better than charity to interrupt poverty. Its principle is based on "solidarity lending" which involves lending to groups that borrow collectively and group members encourage one another to repay.
In establishing Aid-Schemes for poor communities, it is necessary to ensure that they take full ownership and responsibility for such schemes to enhance sustainability of the projects.
Boreholes with purification systems could be placed strategically in communities in enough quantities to avoid long water queues. This water systems should be under the control and supervision of the community, headed by the community. The community members would be asked to pay a very little token monthly to maintain the boreholes and purification systems and more importantly, to create an opportunity for the community members to feel ownership towards the clean water system and thus use them responsibly. The community Leaders would be responsible for the collection of the little token and would report to the water providers on care, maintenance and issues with the boreholes and purification systems.
Currently in Nigeria, people go to fetch water from boreholes and pay about 0.05 cents per 25 liter keg. This is currently on the high side. This model could be used if the "water money" is hard to collect by the community leaders. People could be made to pay their little token at the point of Purchase where they could have flexible options of Payments- for instance, Pay-as-you-go; daily Payments, Weekly or monthly payments. This is to provide enough flexibility to suit different income levels of community members, thereby affording everyone safe drinking waters.
Also, Hand-Pushed water trucks or tankers could be used to supply water at a cost to institutions, the weak and elderly, or whoever indicates interest and flexible payment options could also be made available.
The Solidarity Lending method could be adapted to a number of water and sanitation solutions. The key issue is that there should be community buy-in as well as manageable groups responsible for bearing the low cost financial burden, and urging each other to pay their tokens as at when due.