Mumbai's water stock to last till September 5 next year if 10% water cut approved: BMC data

Mumbai’s water stock will sustain the city until September 5, 2027, if the 10% water cut is extended and the approved reserve storage in Upper Vaitarna and Bhatsa – dams that provide the major share of water to the city - is maintained, reported the water-supply planning data prepared by the Brihanmumbai Municipal Corporation (BMC). It was presented by Abhijit Bangar, additional municipal commissioner (projects), at the civic standing committee on Thursday.

The civic body currently supplies around 4,100 million litres of water a day (MLD) to the city. Among the major reservoirs, Bhatsa has the largest useful storage, at 7,17,037 million litres, of which 7,04,965 million litres was available till September 30. Without a cut and without retaining the reserve storage, supply from the dam is projected to last until June 10, 2027.

With the approved reserve storage in Upper Vaitarna and Bhatsa, the projected date of water availability would extend to August 2, 2027, the data revealed. On the other hand, with the monsoon season officially ending on September 30, 2026, and 75.25% stock available in the state’s irrigation reservoirs, authorities have decided to regulate supply to farmlands until the onset of the monsoon in 2027, so that water is prioritised for drinking purposes until August 31, 2027, said an officer from the irrigation department.