04 September,2026 10:05 AM IST | Mumbai | mid-day online correspondent
The water stock stands at 95.84 per cent of the combined useful live storage capacity of 14,47,363 ML. Representational Pic
Mumbai's seven lakes, which supply drinking water to the city, collectively hold 13,87,126 million litres (ML) of water as of 6 am on September 4, 2026, according to the latest report from the Hydraulic Engineer's Department of the Brihanmumbai Municipal Corporation (BMC).
The water stock stands at 95.84 per cent of the combined useful live storage capacity of 14,47,363 ML. The lakes recorded varying rainfall during the past 24 hours, with Upper Vaitarna receiving the highest rainfall of 42 mm.
Upper Vaitarna recorded a water level of 602.81 metres against its full supply level of 603.51 metres. Its live storage stood at 2,04,781 ML, or 90.19 per cent of its useful capacity of 2,27,047 ML.
The lake received 42 mm of rain in the last 24 hours, taking its cumulative rainfall to 3,732 mm. The water level showed no change over the previous 24 hours.
For comparison, the water level was 603.33 metres on September 4, 2025, when the lake held 2,21,261 ML, or 97.45 per cent of live storage. In 2024, the level was 603.39 metres, with 2,23,190 ML, or 98.30 per cent, of live storage.
Modak Sagar's water level stood at 162.90 metres against its full supply level of 163.15 metres. The reservoir held 1,27,383 ML, accounting for 98.80 per cent of its useful live storage capacity of 1,28,925 ML.
The lake received 17 mm of rainfall in the past 24 hours, while its cumulative rainfall stood at 3,088 mm. The water level fell by 0.04 metres during the last 24 hours.
On the same date in 2025, Modak Sagar stood at 163.14 metres, with 1,28,910 ML, or 99.99 per cent, of live storage. In 2024, it stood at 163 metres, with 1,28,310 ML, or 99.52 per cent, of live storage.
Tansa Lake recorded a water level of 128.50 metres, against its full supply level of 128.63 metres. It held 1,42,592 ML, or 98.29 per cent, of its useful live storage capacity of 1,45,080 ML.
The lake received 11 mm of rain in the past 24 hours, taking its total rainfall to 2,779 mm. Its water level remained unchanged during the period.
On September 4, 2025, Tansa stood at 128.53 metres, with 1,43,181 ML, or 98.69 per cent, of live storage. In 2024, the level was 128.57 metres, with 1,43,887 ML, or 99.18 per cent, of live storage.
Middle Vaitarna recorded a water level of 284.07 metres, against its full supply level of 285 metres. The lake held 1,88,638 ML, or 97.47 per cent, of its useful live storage capacity of 1,93,530 ML.
It received 5 mm of rainfall in the past 24 hours, while its cumulative rainfall stood at 2,754 mm. The water level declined by 0.08 metres.
On September 4, 2025, Middle Vaitarna stood at 283.71 metres, with 1,86,418 ML, or 96.33 per cent, of live storage. In 2024, the level was 284.44 metres, with 1,91,059 ML, or 98.72 per cent, of live storage.
Bhatsa Lake recorded a water level of 141.02 metres, against its full supply level of 142.07 metres. Its live storage stood at 6,88,229 ML, or 95.98 per cent, of its useful capacity of 7,17,037 ML.
The lake recorded no rainfall in the past 24 hours, while its cumulative rainfall stood at 2,542 mm. Its water level fell by 0.02 metres.
On September 4, 2025, Bhatsa stood at 140.88 metres, with 6,84,388 ML, or 95.45 per cent, of live storage. In 2024, the level was 141.22 metres, with 6,93,717 ML, or 96.75 per cent, of live storage.
Vehar Lake continued to hold 100 per cent of its useful live storage. Its water level stood at 80.15 metres, against its full supply level of 80.12 metres.
The lake held 27,698 ML, equal to its full useful capacity of 27,698 ML. Vehar received 2 mm of rainfall in the past 24 hours, while its cumulative rainfall stood at 2,523 mm.
The lake also held 100 per cent of its useful live storage on September 4, 2025 and 2024. Its water level was 80.21 metres in both years, with 27,698 ML in storage.
Tulsi Lake recorded a water level of 139 metres, against its full supply level of 139.17 metres. It held 7,804 ML, or 96.99 per cent, of its useful live storage capacity of 8,046 ML.
The lake received no rainfall in the past 24 hours, while its cumulative rainfall stood at 3,515 mm. Its water level declined by 0.01 metres.
On September 4, 2025, Tulsi stood at 139.19 metres, with 8,046 ML, or 100 per cent, of live storage. In 2024, the level was 139.18 metres, with 8,046 ML, or 100 per cent, of live storage.
The combined live storage of Upper Vaitarna, Vaitarna/Tansa and Middle Vaitarna was recorded at 6,63,395 ML, or 95.51 per cent of the combined useful capacity of 6,94,582 ML.
For comparison, the combined storage was 6,79,770 ML, or 97.87 per cent, in 2025, and 6,86,446 ML, or 98.83 per cent, in 2024.
According to the remarks in the BMC report, Middle Vaitarna's WSCPO gate was closed on July 6, 2026, at 2 pm, while Upper Vaitarna release was stopped on July 6 at 10 am.
The Bhandup Complex recorded 12 mm of rainfall on September 4, with cumulative rainfall of 2,740 mm.
The report states that Vehar Lake started overflowing on July 7, 2026, at 9 pm, followed by Tulsi Lake at 11.43 pm the same day.
Tansa Dam started overflowing on July 22, 2026, at 8.51 am, while Modak Sagar Dam started overflowing on July 23, 2026, at 2.07 am.
Overall, Mumbai's seven lakes are currently holding 95.84 per cent of their combined useful live storage, with the city's water stock at 13,87,126 ML as of 6 am on September 4.
