“…Tremolet et al (2010b), for example, has pointed out that the cost of oon-site sanitation installation is often half or more of a poor household's annual income. Public/private partnerships have been seen as one potential way of ensuring the delivery of coordinated services in informal settlements Ali 2003, 2005;Johannessen et al 2013; Water and Sanitation for the Urban Poor 2012). They provide a coordinate enabling environment for stimulating demand and supply and enable consumers to hold service providers to account.…”