Mumbai Lake Levels Reach 88.81 Percent Storage Capacity After Rain

Mumbai's combined water stock in the seven reservoirs supplying the city rose to 88.81 per cent of total live storage capacity on Tuesday, July 28, 2026, following fresh monsoon rainfall. Data released by the Brihanmumbai Municipal Corporation's (BMC) Hydraulic Engineer's Department showed a 0.41 percentage point increase in lake levels over 24 hours, driven by steady rainfall across catchment areas and key locations like the Bhandup Complex.

The seven reservoirs supplying Mumbai—Upper Vaitarna, Modak Sagar, Tansa, Middle Vaitarna, Bhatsa, Vihar, and Tulsi—collectively held 12,85,449 million litres (ML) of water against a total useful live storage capacity of 14,47,363 ML.

Three of the seven lakes—Modak Sagar, Vihar, and Tulsi—continued to remain at 100 per cent of their useful live storage capacity. Tansa reached 99.02 per cent, while Middle Vaitarna stood at 90.30 per cent capacity. Bhatsa, which is Mumbai's largest reservoir, reached 87.36 per cent capacity, and Upper Vaitarna climbed to 77.51 per cent.

Catchment areas experienced steady precipitation between 6 am on Monday, July 27, and 6 am on Tuesday, July 28, 2026. Upper Vaitarna recorded the highest rainfall at 85 mm, followed by Bhatsa with 72 mm, Modak Sagar with 57 mm, Tansa with 47 mm, and Middle Vaitarna with 40 mm. Tulsi and Vihar recorded 25 mm and 16 mm of rainfall, respectively.

The Bhandup Complex, which houses Mumbai's Master Control Centre for water supply operations, recorded 15 mm of rainfall during the 24-hour period. This took the cumulative seasonal rainfall recorded at the complex to 2,261 mm.

Four reservoirs have already started overflowing during this monsoon season. Vihar and Tulsi began overflowing on July 7, followed by Tansa on July 22 and Modak Sagar on July 23. With total water stock nearing 89 per cent of capacity, the city's drinking water reserves remain in a secure position as the monsoon progresses.