Mumbai’s seven lakes hold 96.64 per cent useful water stock, below levels recorded in 2025 and 2024

Mumbairsquos seven reservoirs collectively held 1398722 million litres ML of water as of 6 am on September 29 accounting for 9664 per cent of their total useful storage capacity of 1447363 ML according to the latest report from the Hydraulic Engineerrsquos Departmentrsquos Master Control Centre at Bhandup ComplexThe water stock remains high but the combined storage is lower than the levels recorded on the same date in the previous two years On September 29 2025 the lakes held 1412131 ML equivalent to 9757 per cent of useful storage while the corresponding figure in 2024 was 1434227 ML or 9909 per centUpper Vaitarna Tansa remain close to full capacityThe four reservoirs comprising the Upper Vaitarna Vaitarna Tansa and Middle Vaitarna group together held 656161 ML or 9447 per cent of their combined useful storage capacity of 694582 MLUpper Vaitarna stood at 60327 metres against its full supply level FSL of 60351 metres The reservoir held 219332 ML representing 9660 per cent of its useful storage capacity Its water level remained unchanged over the previous 24 hours while no rainfall was recorded during the period Its cumulative rainfall for the year stood at 3894 mmIn comparison Upper Vaitarna was at 60345 metres with 9915 per cent storage on the corresponding date in 2025 and at 60350 metres with 9979 per cent storage in 2024Tansa was at 12829 metres against an FSL of 12863 metres It held 138632 ML or 9556 per cent of its useful storage capacity of 145080 ML The lake recorded a 004metre fall over the previous 24 hours with no rainfall recorded during the period Its cumulative rainfall stood at 2959 mmModak Sagar records decline in water levelModak Sagar stood at 16040 metres against an FSL of 16315 metres with 106615 ML of water equivalent to 8270 per cent of its useful storage capacity of 128925 MLThe reservoir recorded a 025metre fall in water level over the previous 24 hours No rainfall was recorded during the period while cumulative rainfall stood at 3254 mmThe storage level was significantly higher on the same date in the previous two years when Modak Sagar had 100 per cent useful storage in both 2025 and 2024Middle Vaitarna stood at 28452 metres against an FSL of 285 metres It held 191582 ML or 9899 per cent of its useful capacity of 193530 ML Its water level rose by 003 metres over the previous 24 hours No rainfall was recorded during the period while cumulative rainfall stood at 2965 mmBhatsa holds nearly 99 per cent of useful storageBhatsa one of Mumbairsquos major water sources stood at 14170 metres against an FSL of 14207 metres The reservoir held 706886 ML accounting for 9858 per cent of its useful storage capacity of 717037 MLThe water level fell by 004 metres over the previous 24 hours No rainfall was recorded during the period while cumulative rainfall stood at 2689 mmVihar at full storage Tulsi near capacityVihar Lake remained at 100 per cent of its useful storage holding 27698 ML Its water level was 8016 metres against an FSL of 8012 metres The reservoir recorded no change in water level over the previous 24 hours and no rainfall during the period Its cumulative rainfall stood at 2757 mmTulsi Lake stood at 13912 metres against an FSL of 13917 metres It held 7978 ML or 9915 per cent of its useful storage capacity of 8046 ML The lake recorded a 002metre fall over the previous 24 hours while no rainfall was recorded during the period Its cumulative rainfall stood at 3803 mmReservoir gates and overflow detailsThe report noted that the Middle Vaitarna WSCPO gate was closed on July 6 at 2 pm while the release from Upper Vaitarna was stopped at 10 am on the same dayVihar Lake began overflowing on July 7 at 9 pm followed by Tulsi Lake at 1143 pm Tansa Dam started overflowing on July 22 at 851 am while Modak Sagar Dam began overflowing on July 23 at 207 amThe Bhandup Complex recorded no rainfall on September 28 while its cumulative rainfall stood at 2961 mm