The Ministry of Transport and the Ministry of Environment and Physical Planning are responsible for improving water supply, and the Ministry of Health is entrusted with monitoring the quality of drinking water (through the Public Health Centres). Water is managed in cities and some rural areas through the Public Enterprises of Communal Hygiene (under the Ministry of Transport), while 29% of the population relies on piped water systems managed by the municipalities and 6% on local sources of water. But water quality is often not a priority for rural municipalities.