unlike a decade back, locals in india drink from bottled packaged mineral water. it is as safe as it gets. the best bet is to boil water, anywhere in the world
bacterias , viruses and primarily protozoas like giardia and cryptosporadiam do not surviver such high temperatures...altitude does not matter at all...
if at any altitude water at boiling temp kills all.
also in INDIA its not really the CONTENT BUT THE CONTAINER THAT WILL GET TO YOU. so be very careful having CHAI , FRUIT JUICES FROM kiosks....
the glasses etc... are not cleaned or bleched so be careful.
the packaged scene is sooo good (due to local demand) that u do not hve to worry at all just take precautions...
also as pointed out earlier, do carry extra litrs of pckgd water while transitting thru railway stations, bus stations .......
safe journey
PS: i usually recommend people to have loose motions.... u can taste more :))))
also helps relating to body in a different way :))))) the only memories tht r left behind r the worst ones... kinda funny
cheers


Don't really agree with the water being pumped up from the plains, there are lots of dams and tanks in the hilly regions, what would be the point of letting it trickle down to the plains and then have to pump it back up. I know India can be wasteful when it comes to resources, but i don't think they would take coal to Newcastle.
People get terribly para about the water in India, but never give a second thought for the lookwarm dahl, that has most probably been washed in tap water and never reached boiling point on the stove, or the chapati's that have been rolled on a board that's never been cleaned since it was made. If dodgy water bugs you, wander through to the kitchen of a local restaurant and watch them clean the pans, plates and utensils.

Well bottled water is safe. But do check if the bottle has not been tampered with. Tap water cant be trusted in the cities (except Jamshedpur).