Frequently Asked Questions
How much water is left in Mumbai lakes?
As of 11 Sept 2026, Mumbai's 7 lakes hold 13,95,331 ML out of 14,47,363 ML total capacity — that's 96.4% full. At current consumption (~3,950 MLD), this is roughly 353 days of supply.
Will BMC remove the 10% water cut?
Water cuts are typically removed once combined lake storage crosses 90-95% or when monsoon inflows are consistently strong. BMC reviews storage levels weekly and announces changes via press releases.
When do Mumbai lakes overflow?
Smaller lakes (Tulsi, Vihar) overflow first, usually by mid-July. Modak Sagar and Tansa follow. Bhatsa, the largest, rarely overflows before August. Currently 4 lakes are overflowing.
Which lakes supply water to Mumbai?
Seven lakes: Bhatsa (49.5% of supply), Upper Vaitarna (15.7%), Middle Vaitarna (13.4%), Tansa (10%), Modak Sagar (8.9%), Vihar (1.9%), and Tulsi (0.6%). Raw water is treated at Bhandup WTP (world's largest), Vehar WTP, and Tulsi WTP.
How many days of water does Mumbai have?
At current storage of 13,95,331 ML and daily demand of ~3,950 MLD, Mumbai has approximately 353 days of water. This estimate doesn't account for ongoing monsoon inflows which continually replenish the supply.