Mumbai’s drinking water reserves witnessed a significant increase after continuous rainfall over the past two days, with the combined storage of the city’s seven reservoirs reaching 61.9% of their total capacity on Wednesday.
According to the Brihanmumbai Municipal Corporation (BMC), the reservoirs received an additional nearly 60,000 million litres of water in the last 24 hours, taking the total storage to 8,95,907 million litres.
Seven reservoirs receive strong inflows
Mumbai depends on seven lakes—Bhatsa, Modak Sagar, Upper Vaitarna, Middle Vaitarna, Tansa, Vihar and Tulsi—for its drinking water supply. These reservoirs are located across Mumbai, Thane, Palghar and Nashik districts and largely rely on monsoon rainfall.
After water levels had dropped below 6% earlier this season, storage gradually recovered to around 50% in early July before inflows slowed as rainfall weakened. A fresh spell of monsoon showers this week has once again accelerated the replenishment of the reservoirs.
During the corresponding period last year, the combined water stock stood at more than 85.32% of total capacity.
Vihar and Tulsi remain full, Tansa nears overflow
Among the seven reservoirs, Vihar and Tulsi continued to remain at 100% capacity.
Tansa reached 97.96% of its storage capacity, making it one of the reservoirs closest to overflowing if rainfall continues. Modak Sagar was more than 90% full, while Bhatsa, the city’s largest source of drinking water, stood at 57.27% capacity.
Meanwhile, Middle Vaitarna recorded 53% storage, while Upper Vaitarna remained at 39% capacity.
BMC data also showed that the catchment areas received between 70 mm and 224 mm of rainfall over the past 24 hours, supporting further inflows into the reservoirs.
IMD issues rain alerts for Mumbai and nearby districts
The India Meteorological Department (IMD) has issued a yellow alert for Mumbai until Thursday, forecasting heavy rainfall at isolated locations along with strong winds.
The weather department said the city is likely to witness a generally cloudy sky with moderate to heavy rainfall at a few places across Mumbai and its suburbs over the next 48 hours. Gusty winds reaching 50–60 kmph are also expected during this period.
The IMD has also issued an orange alert for Thane and Palghar, where heavy to very heavy rainfall is likely at isolated places. Nashik remains under a yellow alert until Thursday due to the possibility of heavy rainfall and thunderstorms.
With the monsoon remaining active over the reservoir catchment areas, officials expect Mumbai’s water storage to continue improving in the coming days.