Latest Answer: According to government reports, most of the housing projects do not comply with rainwater harvesting. To add to it, the increasing number of housing projects has also adversely affected the water table. Around 90% of the buildings in the city bank on water tankers and borewells. In accordance to a survey by the stamp and registration department, a number of flats are lying vacant in Bangalore, since homebuyers are afraid to purchase them due to water scarcity. Lack of water connection and tankers in such buildings have significantly contributed to the decline in possession of flats in Bangalore