According to the latest information available from the World Health Organization (WHO), in 2012, 99% of those living in rural Malaysia, and 100% of those in urban Malaysia had access to improved drinking water sources. In 1990, only 82% of those in rural Malaysia had access to improved drinking water sources, while 94% of those living in urban areas had access to clean water. These indicators show a major change in the living conditions of those in rural Malaysia with respect to clean drinking water, which effects many other health indicators.
The World Health Organization maintains these and many more statistics about water, health, and disease throughout the world. Their data is considered the most comprehensive and timely health information available. Spreadsheets and downloadable files are obtainable to compare information for many of the countries listed in their database.