The importance of water supply and sanitation system is reflected in their inclusion in the Millennium Development Goals (MDGs). The water–sanitation–health nexus reveals a dynamic relationship involving the environmental parameters, socio-economic and cultural factors, and human health. Nigeria's water resources are unevenly distributed and strongly influenced by rainfall variability, river basin characteristics, and the underlying hydrogeological characteristics. water, sanitation and hygiene (WASH) management is located in several institutional bodies with very limited capacity for coordination and cross-sector collaboration. In Nigeria, for instance, public policy emphasis on sanitation and hygiene is shaped by emergencies, prevailing i...