World map of tap water drinkable by all

Did you know that in 187 countries, the tap water isn’t safe to drink for everyone? It may be drinkable, but not by everyone if their body isn’t used to it. If you visit the countries in the blue area, you can drink with no risk; if you go to a country in the red area, it’s better to drink bottled water, or purify the tap water before drinking it, otherwise your body may react badly!