Mumbai's seven lakes held 95.84 per cent of their combined useful live storage, with total water stock at 13,87,126 megalitre (ML) as of six am on September four. The report set out reservoir levels, live storage and recent rainfall for each lake to indicate urban water availability. The figures reflect monsoon inflows and reservoir operations.

Upper Vaitarna was at 602.81 metres against a full supply level of 603.51 metres and held 2,04,781 ML, or 90.19 per cent of its useful capacity of 2,27,047 ML, after 42 mm of rain in 24 hours and cumulative 3,732 mm; the level was unchanged. The lake held 97.45 per cent on the same date in 2025 and 98.30 per cent in 2024.

Modak Sagar stood at 162.90 metres against 163.15 metres and held 1,27,383 ML, or 98.80 per cent of 1,28,925 ML, after 17 mm of rain and cumulative 3,088 mm. Tansa recorded 128.50 metres against 128.63 metres and held 1,42,592 ML, or 98.29 per cent of 1,45,080 ML, with 11 mm of rain and total 2,779 mm.

Middle Vaitarna rose to 284.07 metres against a 285 metre full supply level and held 1,88,638 ML, or 97.47 per cent of 1,93,530 ML, after five mm of rain and cumulative 2,754 mm; the level fell 0.08 metres. Bhatsa held 6,88,229 ML, or 95.98 per cent of 7,17,037 ML, with no rain in 24 hours and cumulative 2,542 mm. Vehar remained at 100 per cent useful live storage, holding 27,698 ML after two mm and total 2,523 mm.

Tulsi measured 139 metres against 139.17 metres and held 7,804 ML, or 96.99 per cent of 8,046 ML, with no rain in the last 24 hours and cumulative 3,515 mm. The combined live storage of Upper Vaitarna, Vaitarna/Tansa and Middle Vaitarna stood at 6,63,395 ML, or 95.51 per cent of 6,94,582 ML. The municipal report recorded gate closures and dates when Vehar, Tulsi, Tansa and Modak Sagar began overflowing in July, highlighting management actions during peak inflows.