Responsibility for the water and sanitation sector is shared between the Ministry of Health, Labour and Welfare, in charge of water supply for domestic use; the Ministry of Land, Infrastructure, Transport and Tourism, in charge of water resources development as well as sanitation; the Ministry of the Environment, in charge of ambient water quality and environmental preservation; and the Ministry of Internal Affairs and Communications, in charge of performance benchmarking of utilities. Access to an improved water source is universal in Japan. About 98% of the population receives piped water supply from public utilities.