There are substantial regional differences in coverage for water. For example, in nine provinces located in the Central, Northeastern and Eastern part of the country less than 70% of the population had access to an improved source of water supply according to the 2002 census. Poor households exhibit lower levels of access: only 56% of poor households are connected to water house connections as opposed to 80% of non-poor households. Just 20% of poor households have access to sewers, as opposed to 50% for the non-poor.