Originally Posted by
Rotweiler
It is not if the potable water of the country is safe or not...
It is coming out form the water tanks of the airplanes. Have you ever been checked those water tanks? From inside? I did...
I suggest you to do this...
It is never drinkable...
Believe it or not but Rotweiler has got a point. Having been an enigneer for nearly a decade before I started flying I have to agree that if you have seen the inside of a water tank you would not drink the water.
The airline I worked for cleaned the water tanks once a month by flushing them with strong chlorinated water for an hour. Howeven during the yearly check you would still find some contaminants on the inside of the water tanks. Nothing that would make a person ill but just not as appealing to look at. The flushing with chlorinated water kills any bad bacteria but it doesn't stop a small layer of sludge to build up on the inside of the tank.
As has been mentioned already, potable water is perfectly safe to drink. However if you have seen the inside of a water tank after a year of use before it is cleaned you will stick with bottled water.