You would first have to see the demand for bottled water in the urban areas. You are surely not setting up this venture for the sake of public good. And bottled water is not something that people who are poor and lack water, would be able to buy.
In India, bottled water is what most people buy in restaurants. Food which has been cooked and the harmful microorganisms destroyed due to the high temperature is considered safe to eat, but I always find people ordering bottled water to consume with the food.
If there is sufficient demand for bottled water, you can move to the next steps that would include determining the cost of production, how you would compete with the existing players who would have an edge over you, the distribution channels, etc.
Are you trying to sell bottled water in India? There are some parts of the country where this would be sucessful. The biggest problem would be transportation. The poorer areas of the country that need water the most also don't have solid roads. The people that need the water, because they don't have access to sanitary water, also cannot pay for it. So you need to find an inexpensive way to get them the water and inexpensive water.