New Delhi Mumbai and Delhi which are presently reeling under water crisis will require the maximum supply of the municipal tap water in the world by 2025, according to a Mckinsey Global Institute report.

Mumbai tops the list of the 20 global cities in terms of municipal water demand in the next 13 years, followed by Delhi, the report said. Three other Indian cities — Kolkata, Pune and Hyderabad — are ranked seventh, 12th and 16th respectively in the list of 20 cities needing the maximum supply.