Tansa Lake is among Mumbai’s crucial water sources and has a maximum storage capacity of 14,508 crore litres. The overflow has further strengthened the city’s water reserves during the ongoing monsoon season, as sustained rainfall across the reservoir catchment areas continues to improve storage levels.
The development marks another significant improvement in Mumbai’s monsoon water storage position, with several reservoirs either reaching full capacity or moving closer to their maximum levels after continuous rainfall over the past several weeks.
According to the Hydraulic Engineer’s Department at the Bhandup Complex, the total water stock in the seven reservoirs supplying drinking water to Mumbai has increased to 8,95,907 million litres (ML), accounting for 61.90 per cent of the total useful live storage capacity.
Between 6 am on Tuesday, July 21, and 6 am on Wednesday, July 22, Mumbai’s water reserves recorded a rise of 4.15 percentage points, increasing from 57.75 per cent to 61.90 per cent following widespread rainfall across the reservoir catchment regions.
Bhatsa, Mumbai’s largest water-supplying reservoir, currently contains 4,10,644 ML of water, representing 57.27 per cent of its useful live storage capacity. The reservoir recorded the highest increase in water level during the last 24 hours, rising by 1.72 metres.
Upper Vaitarna Records Highest Rainfall Among Reservoir Catchments
Heavy rainfall continued across the lake catchment areas, with Upper Vaitarna receiving the highest rainfall of 224 mm during the past 24 hours.
Other reservoir catchments recorded rainfall levels of 96 mm at Bhatsa, 71 mm at Middle Vaitarna, 71 mm at Tulsi, 70 mm at Tansa, 67 mm at Modak Sagar, and 65 mm at Vihar.
The combined storage of Upper Vaitarna, Modak Sagar, Tansa, and Middle Vaitarna reservoirs has reached 4,49,519 ML, equivalent to 64.72 per cent of their total live storage capacity.
Bhandup Complex Crosses 2,000 mm Seasonal Rainfall Mark
The Bhandup Complex recorded 52 mm rainfall during the last 24 hours, increasing the season’s cumulative rainfall total to 2,006 mm.
The Hydraulic Engineer’s Department stated that the Middle Vaitarna WSCPO gate has remained closed since 2 pm on July 6, while the release of water from Upper Vaitarna has remained suspended since 10 am on July 6.
Vihar Lake has been overflowing since 9 pm on July 7, while Tulsi Lake has continued overflowing since 11:43 pm on July 7, indicating sustained monsoon inflows into Mumbai’s water supply system.
With Tansa Lake joining the list of overflowing reservoirs, Mumbai’s water storage position has witnessed a substantial improvement during the monsoon season. Continuous rainfall across the catchment areas has significantly boosted the city’s drinking water reserves, strengthening the availability of water resources for Greater Mumbai.
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