New Delhi, June 29 -- Mumbai is once again facing a familiar summer concern: will the city have enough water despite monsoon showers?

The country's financial capital and its metropolitan region rely heavily on rainfall for their water supply. Mumbai receives its drinking water from seven reservoirs - Bhatsa, Upper Vaitarna, Modak Sagar, Tansa, Middle Vaitarna, Tulsi and Vihar.

Unlike several other metropolitan cities, Mumbai has no major alternative source of potable water, making a healthy monsoon crucial for meeting its drinking water needs.

Concerns have grown over the city's water supply following the delayed arrival of the southwest monsoon. According to data from the Brihanmumbai Municipal Corporation's (BMC) Hydraulic Engineer's...