Bengaluru comes second the list of 11 cities that faces the threat of running of water. Cape Town in South Africa comes first in the list.
The findings were by a UN-backed study that was published by the BBC.
The study has projected that global demand for fresh water will exceed supply by 40% in 2030, thanks to a combination of climate change, human action and population growth.
On Bengaluru, the study says that the city's infrastructure was unable to scale up to match the rising population, particularly water and sewage systems. As a result, a large amount of water was either wasted or is too polluted to use. The city of lakes does not have a single lake whose water is fit for human consumption, the study also said.
The third city on the list was China's capital Beijing. The study said that only 145 cubic metres was available to each inhabitant of the megalopolis of 20 million. It also quoted a Columbia University study which found that China's water reserves declined 13% between 2000 and 2009.