Mumbai lake levels reached 95.97 per cent of total live storage capacity on September 6, with the city’s seven drinking-water reservoirs holding 13,89,075 million litres, according to the Hydraulic Engineers Department at the Bhandup Master Control Centre.
The water stock was recorded at 6 am on Sunday. Although the reservoirs remain near capacity, the current level is lower than during the same period in 2025, when they held 14,05,437 million litres, or 97.10 per cent of live storage. The stock is also below the corresponding figure for 2024, when the lakes contained 14,19,276 million litres, representing 98.06 per cent of capacity.
Vihar Lake was at 100 per cent of its live storage capacity and has been overflowing since July 7, the department’s report stated. Tulsi was at 96.59 per cent, Tansa at 98.37 per cent, Middle Vaitarna at 96.92 per cent and Bhatsa at 96.10 per cent. Upper Vaitarna was the lowest-filled reservoir at 91.51 per cent, while Modak Sagar stood at 98.13 per cent.
Bhatsa, Mumbai’s largest reservoir, held 6,89,053 million litres. Upper Vaitarna contained 2,07,760 million litres, Middle Vaitarna 1,87,572 million litres, Tansa 1,42,710 million litres and Modak Sagar 1,26,510 million litres. Vihar held 27,698 million litres and Tulsi 7,771 million litres.
Light showers continued across the lake catchment areas during the previous 24 hours. Upper Vaitarna received the highest rainfall at 28 millimetres, followed by Bhatsa at 18 mm, Tansa at 16 mm, Middle Vaitarna at 12 mm, Vihar at 7 mm, Tulsi at 6 mm and Modak Sagar at 5 mm.
The Bhandup Complex recorded 27.52 mm of rainfall during the same period, taking its cumulative seasonal rainfall to 2,752 mm. Cumulative monsoon rainfall at the reservoirs stood at 3,768 mm in Upper Vaitarna, 3,537 mm in Tulsi, 3,094 mm in Modak Sagar, 2,795 mm in Tansa, 2,782 mm in Middle Vaitarna, 2,560 mm in Bhatsa and 2,543 mm in Vihar.
The department also reported changes in reservoir operations. Tansa Dam, which had been overflowing until August 22, has since recorded a decline in storage. Modak Sagar’s water level also decreased marginally on August 23. The Middle Vaitarna WSCPO gate remained closed, while the release of water from Upper Vaitarna had been suspended since July 6, according to the Hydraulic Engineers Department.
