The civic body said the decision was taken as water storage has dropped sharply, while forecasts of a weak monsoon this year have raised concerns over future supply.
At present, Mumbai’s seven lakes hold only around 28 per cent water storage of their total capacity of 14,47,363 million litres. The city’s daily water supply demand currently stands between 3,950 and 4,100 million litres.
According to BMC officials, the current water stock will last only till July 6 if supply continues at the usual rate. However, with a 10 per cent cut and careful use of reserve stock, the available water can be stretched till August 17, 2026.
A civic official said the move is necessary to avoid a bigger shortage in the coming months, especially if rainfall remains below normal during the Southwest monsoon.
To manage the shortfall, BMC has also approached the state’s Urban Development Department seeking an additional 237 mcm of water from the Vaitarna and Bhatsa reservoirs.
Officials warned that if the lakes do not receive enough rainfall this monsoon, Mumbai could face a serious water shortage that may continue until next year’s rainy season.
Earlier, civic officials had discussed a water cut between five and 10 per cent. After reviewing the lake levels and weather forecasts, BMC has now confirmed a 10 per cent reduction in water supply across the city.
Residents are expected to be urged to use water carefully as Mumbai prepares for a challenging summer and uncertain monsoon season.
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