The short answer to this question is, no! In India, tap water is not considered fit for drinking purposes as they can be full of all kinds of pollutions that are extremely unsafe. Restaurants will provide treated drinking water, but we recommend drinking the best brands bottled water. Branded companies have the highest standards maintained during filtration and bottling of the water. Branded mineral water bottles may not be available everywhere, so make sure to check the seal because some manipulative shopkeepers may refill the bottle with tap water and seal it unprofessionally indicating adulteration.