Mumbai Lake Levels Cross 90 Percent Capacity Following Sustained Monsoon Rain

Total water stock in the seven lakes supplying Mumbai crossed the 90 per cent mark on August 13, 2026, providing a significant boost to the city’s water security. According to a report issued at 6 a.m. by the Hydraulic Engineer’s Department’s Master Control Centre at the Bhandup Complex, collective water storage stood at 90.26 per cent of total useful live capacity, up from 89.49 per cent recorded the previous day.

The combined useful live storage capacity across the seven reservoirs is 14,47,363 million litres. As of Thursday morning, the lakes held 13,06,364 million litres, reflecting an increase of 0.77 percentage points over a 24-hour period as continued rainfall strengthened reserves in catchment areas.

Data from the report shows that Vihar Lake and Tulsi Lake have reached 100 per cent of their useful live storage capacity. Tansa Lake stood near full capacity at 99.18 per cent, while Middle Vaitarna recorded 93.72 per cent. Among the remaining reservoirs, Bhatsa held 88.07 per cent, Modak Sagar stood at 83.63 per cent, and Upper Vaitarna reached 81.45 per cent.

Several lakes have already overflowed during the ongoing monsoon season. Vihar Lake began overflowing on July 7, followed by Tulsi Lake later that same day. Tansa Dam started overflowing on July 22, while Modak Sagar began overflowing on July 23.

Monsoon showers over the 24-hour reporting period added further volume to the catchment areas. Modak Sagar recorded the highest precipitation at 35 mm, followed by Upper Vaitarna with 26 mm and Middle Vaitarna with 25 mm. Tansa received 12 mm, Bhatsa recorded 11 mm, Tulsi received 7 mm, and Vihar registered 3 mm of rain.