Water supply and sanitation in Rwanda is characterized by a clear government policy and significant donor support. In response to poor sustainability of rural water systems and poor service quality, in 2002 local government in the Northern Byumba Province contracted out service provision to the local private sector in a form of public–private partnership. Support for public-private partnerships became a government policy in 2004 and locally initiated public-private partnerships spread rapidly, covering 25% of rural water systems as of 2007. In urban areas, the Water and Sanitation Corporation (WASAC) is in charge of water supply. In March 2015, the government signed a 27-year contract with a private company to invest $75 million in order to provide 40,000 cubic meters/day of bulk water from a wellfield next to the Nyabarongo River to the capital Kigali. It is the first contract of this type in Sub-Saharan Africa. Access Level and trend Figures on access to water and sanitation vary depending on the source of information, apparently in part because different definitions may have been used for access to an improved water source and improved sanitation. The fact that many rural water systems are not functioning properly makes it also difficult to estimate effective access to improved water supply. The following table compares access to water supply according to various sources, highlighting the difficulty to obtain reliable data on the change in access to water supply because of different definitions used. The data appear to indicate that access decreased over time, while in the same period significant investments were undertaken in rural water supply. The government's 2002 Poverty Reduction Strategy Paper acknowledges that indeed "sustained access to potable water sources has probably declined in rural areas" since 1995. A main reason is poor maintenance and insufficient cost recovery, leading to the breakdown of systems shutting down water supply's, in particular those relying on pumping. Table: Access to an improved source of water supply according to various sources According to both the 2000 Multi-Indicator Survey and the 2000 Demographic and Health Survey, access to an improved source of water supply was 91% in urban areas and 67% in rural areas. According to the same source, access to adequate sanitation was 54% in urban areas and 37% in rural areas. According to calculations based on data from the 2002 census, access to an improved source of water supply was 80% in urban areas and 67%