You guys should stop being so sensationalist and paranoid. The water the tanks in railway bogies are filled with is, in principle, drinkable, that is, not worse than the water coming out of pipes in India generally is (and that means: bad). Once boiled (and chai is boiled, over and over) it's been ridden of the really bad stuff in it - otherwise, you guys would all be dead by now.
As we say in Corsica: All what doesn't kill you it makes you better. Cheers, and have a 'railway tea'! p+7D!
