Mumbai Rains: City's Water Stock Across 7 Lakes Crosses 39.5% Amid Promising Monsoon In June

Mumbai: Mumbai’s water stock has seen a modest but steady improvement following consistent rainfall in lake catchment areas. According to the Hydraulic Engineer’s Department report issued from the Bhandup Complex at 6:00 am on Sunday, June 29, 2025, the total water storage across the seven key lakes now stands at 571,670 million litres. This accounts for approximately 39.5 per cent of the total useful content of 14.47 lakh million litres required to meet the city’s annual water demand.

🚰 मुंबईला पाणीपुरवठा करणाऱ्या ७ जलाशयांचा आज सकाळी ६ वाजेपर्यंतचा अहवाल
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🚰 Report of water stock in the seven lakes, supplying water to Mumbai, till 6am today.#MumbaiRains#MyBMCUpdates pic.twitter.com/ntBY8X5rPi

— माझी Mumbai, आपली BMC (@mybmc) June 29, 2025

Details On Water Levels For All Lakes

The rainfall over the past 24 hours has contributed to rising lake levels, with Middle Vaitarna showing the highest increase at 0.64 metres. It recorded 10 mm of rainfall, bringing its total for the season to 903 mm, the highest among all lakes. Upper Vaitarna, another major reservoir, witnessed a 0.12-metre rise with 32 mm of rainfall in a day, pushing its total seasonal rainfall to 468 mm. Bhatsa Lake, which remains the largest contributor to Mumbai’s water supply, rose by 0.40 metres and recorded 17 mm of rainfall. It now holds a substantial 238,959 million litres in live storage.

Though lakes such as Modak Sagar, Tansa, and Tulsi received moderate rainfall ranging between 18 to 58 mm, lakes like Vehar recorded no rainfall on June 29. However, the cumulative rainfall in these regions remains relatively strong. For instance, Tulsi’s total seasonal rainfall has reached 760 mm, while Tansa and Modak Sagar stand at 291 mm and 844 mm respectively.

The report notes that the Upper Vaitarna lake stopped releasing water from June 9 to help conserve storage. Meanwhile, the gate at Middle Vaitarna remains closed for the same purpose. This strategic management of water resources is essential as the city awaits heavier and more widespread monsoon activity. Bhandup Complex itself registered 8 mm of rainfall in the last 24 hours, with a seasonal total of 472 mm.

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Officials are cautiously optimistic. Although the water stock is significantly better than the same period last year, where it stood at just 78,579 million litres, the BMC continues to encourage water conservation. The situation is being closely monitored, and authorities are prepared to act if monsoon patterns shift unfavorably in the coming weeks.

The first phase of monsoon replenishment has brought some relief, but sustained rainfall through July will be critical in determining whether Mumbai can avert water cuts and comfortably sail through the remaining months of the year.