19 July,2026 09:57 AM IST | Mumbai | mid-day online correspondent
Representational image. File pic
Mumbai's seven reservoirs supplying drinking water to the city recorded a combined live storage of 7,58,245 million litres (ML) on Saturday, July 18, taking the total water stock to 52.39 per cent of the system's total useful capacity of 14,47,363 ML, according to data released by the Brihanmumbai Municipal Corporation's (BMC) Hydraulic Engineer's Department at 6 am.
The city's water stock has improved significantly compared to the same period in 2024, when reservoir levels stood at 39.23 per cent. However, storage remains below the 81.86 per cent recorded on the corresponding day in 2025.
[mumbaiwaterstock]
The four major reservoirs - Upper Vaitarna, Modak Sagar, Tansa and Middle Vaitarna - together held 3,74,104 ML of water, representing 55.74 per cent of their combined useful storage capacity of 6,94,582 ML.
Upper Vaitarna recorded a water level of 598.36 metres, an increase of 0.9 metres over the previous 24 hours. The reservoir stored 72,209 ML, or 31.80 per cent of its useful capacity. It received 55 mm of rainfall during the day, taking the season's cumulative rainfall to 994 mm.
Modak Sagar reached a water level of 159.83 metres and contained 1,02,000 ML of water, equivalent to 79.12 per cent of its capacity. The reservoir received 44 mm of rainfall, with cumulative monsoon rainfall reaching 1,491 mm.
Tansa recorded a water level of 127.43 metres, rising 0.22 metres in the past 24 hours. The reservoir held 1,22,404 ML, or 84.37 per cent of its capacity. It received 75 mm of rainfall, while cumulative seasonal rainfall touched 1,531 mm.
Middle Vaitarna registered the highest rise in water level among the major reservoirs, climbing 0.30 metres to 265.19 metres. It currently stores 88,006 ML, accounting for 46.78 per cent of its useful capacity. The lake received 54 mm of rainfall during the past 24 hours, taking cumulative monsoon rainfall to 1,125 mm.
Bhatsa, Mumbai's largest source of drinking water, held 3,35,495 ML of water, which is 46.79 per cent of its useful storage capacity.
The reservoir's water level stood at 126 metres, rising by 0.48 metres over the previous day. It received 112 mm of rainfall in the last 24 hours, taking cumulative seasonal rainfall to 1,301 mm.
Among the smaller reservoirs, Vihar Lake remained at 100 per cent capacity, storing 27,698 ML of water. Its water level remained steady at 80.22 metres. The lake received 31 mm of rainfall during the past 24 hours, while cumulative rainfall this monsoon reached 1,704 mm.
Tulsi Lake was at 98.33 per cent of its useful capacity, holding 7,911 ML of water. Its water level stood at 139.08 metres, a marginal increase of 0.02 metres from the previous day. The reservoir received 42 mm of rainfall, taking cumulative seasonal rainfall to 2,305 mm.
According to the BMC, Vihar Lake began overflowing on July 7 at 9 pm, while Tulsi Lake started overflowing on July 7 at 11.43 pm.
The BMC's Hydraulic Engineer's Department said the Middle Vaitarna WSCPO gate has remained closed since 2 pm on July 6, while water release from Upper Vaitarna has remained suspended since 10 am on July 6.
The Bhandup Complex, which houses one of Mumbai's key water treatment facilities, recorded 16 mm of rainfall during the last 24 hours. The complex has received 1,747 mm of cumulative rainfall so far this monsoon.
