Mumbai Rains: City’s Water Stock Rises to 81.86% as All Seven Lakes Show Steady Increase; Modak Sagar Overflows

Mumbai, July 19, 2025 : With continuous rainfall in the city, Mumbai's seven water-supplying lakes have shown a significant rise in water levels, pushing the total water stock to 81.86% of capacity. According to data released by the Hydraulic Engineer’s Department at 6:00 am on Saturday, July 19, the combined useful content in all reservoirs now stands at 11,84,796 million litres — more than double the 5,67,778 million litres recorded on the same date last year.

Among all lakes, Modak Sagar became the first to reach 100% capacity and began overflowing on July 9. So far this monsoon, the lake has received 158.3 mm of rainfall. It currently stands at a level of 163.08 metres, holding 1,28,910 million litres of useful water. The overflow is a strong indicator of healthy inflows due to consistent rain.

Middle Vaitarna currently stores the highest volume of water among the lakes, with 1,80,823 million litres. The water level rose by 0.23 metres in the past 24 hours. The reservoir has received 1,743 mm of rainfall so far — the highest among all lakes.

Upper Vaitarna follows closely, with 1,73,014 million litres of water at a level of 601.83 metres. However, the lake showed a slight dip of 0.04 metres compared to the previous reading. It has received 1,097 mm of rainfall this season. Bhatsa Lake, meanwhile, holds 5,51,229 million litres and recorded a 0.20-metre rise since yesterday. It has seen 1,483 mm of rainfall this monsoon, reflecting robust catchment inflows.

Tansa Lake is currently at 91.23% of its useful content, with 1,32,359 million litres stored. The smaller reservoirs — Vihar and Tulsi — have also benefitted from consistent rainfall. Vihar holds 14,674 million litres, while Tulsi has 4,327 million litres.

The BMC has confirmed that Upper Vaitarna began releasing water on July 5, while Middle Vaitarna’s gates were opened on July 17, in response to the increasing water levels.

With reservoirs now close to full capacity and rains continuing, the civic body remains optimistic about uninterrupted water supply for Mumbai in the coming months. Officials noted that if current rainfall patterns persist, there will be no shortage of drinking water through the rest of the monsoon and beyond.