Mumbai Rains: Water Stock In City's 7 Lakes Over 74% Full Amid Heavy Rainfall In Catchment Areas

Mumbai: Mumbai’s seven lakes have reached 74.47 per cent of their total useful live storage capacity, according to the daily report issued by the Hydraulic Engineer’s Department of the BMC, as of 6:00 am on July 12, 2025. This marks a substantial rise compared to the same date last year, when storage levels stood at just 27.65 per cent.

🚰 मुंबईला पाणीपुरवठा करणाऱ्या ७ जलाशयांचा आज सकाळी ६ वाजेपर्यंतचा अहवाल
---
🚰 Report of water stock in the seven lakes, supplying water to Mumbai, till 6am today.#MumbaiRains#MyBMCUpdates pic.twitter.com/2lvglyT4EU

— माझी Mumbai, आपली BMC (@mybmc) July 12, 2025

Details On Water Levels Of All Lakes

The combined storage across all lakes now stands at 10.77 lakh million litres (ML) out of a total capacity of 14.47 lakh ML. This includes major reservoirs like Bhatsa, Upper Vaitarna, Modak Sagar, Tansa, Middle Vaitarna, Vihar and Tulsi. The Vaitarna group of lakes (Upper Vaitarna, Modak Sagar, Tansa, and Middle Vaitarna) alone account for 6.95 lakh ML of useful live storage, out of which 5.92 lakh ML is currently filled, bringing them to 85.56 per cent of capacity.

Mumbai News: BMC Begins Demolition, Rebuild Of 7 Unsafe Bridges In Malad-Kandivali At ₹26.43 Crore; Check Details Of The Project

Upper Vaitarna has reached 74.89 per cent of its capacity, Modak Sagar has reached full capacity at 100 per cent, and Tansa is at 82.34 per cent. Middle Vaitarna stands at 92.87 per cent. The smaller lakes have also shown strong figures, Tulsi is nearly full at 93.63 per cent while Vihar has reached 61.90 per cent.

The Bhatsa dam, which is Mumbai’s biggest source, has 4.66 lakh ML water stored out of a total capacity of 7.19 lakh ML, currently at 65.01 per cent of its live capacity. Modak Sagar, one of the first to fill up, started overflowing on July 9 at 6:27 am. Upper Vaitarna began water release operations on July 5, and Middle Vaitarna opened gates on July 7 due to rising levels.

🔹Modak Sagar Lake, one of the 7 lakes supplying water to the Mumbai Metropolitan City (BMC area), started overflowing at around 6:27 AM today.

🔹One gate of the Modak Sagar Lake has been opened by 1 foot, releasing a discharge of 1,022 cusecs per second.

🔹The full storage… pic.twitter.com/fXjBBAyJJW

— माझी Mumbai, आपली BMC (@mybmc) July 9, 2025

Rainfall Data For Lake Regions

Rainfall has been a key contributor to the current water stock. On July 11, Modak Sagar received 34 mm rainfall, Tansa 22 mm, Middle Vaitarna 19 mm, Bhatsa 23 mm, Vihar 6 mm and Tulsi 8 mm. Upper Vaitarna recorded no rainfall for the day. The Bhandup Complex itself recorded 15 mm of rain in 24 hours, bringing its monsoon total to 712 mm.

With reservoirs at comfortable levels, the BMC is unlikely to impose water cuts in the near future. However, authorities will continue to monitor inflow and conduct regulated water releases to avoid downstream flooding. The healthy lake stock indicates that the city’s water security is well on track for the remainder of the year.