Many countries have tap water that is not safe for consumption. Singapore has pretty good tap water, however even though the source of water is good (especially the "dreaded" New Water - they use some really good filtering techniques!), there is a variance in the quality of water in each home or office because of the age and quality of the piping. That is why I still suggest that we use a water filter in our homes. Below is an article I wrote about how to choose a filter. Stay Hydrated!