Thirsty Metropolis

Barely a year after torrential rains submerged large parts of Mumbai’s, the city’s water sources have fallen to critical levels and water rationing has returned. This year, a bad monsoon has led to Mumbai’s reservoirs falling to barely 9 percent of its capacity, forcing water cuts across India’s financial capital.

The Brihanmumbai Municipal Corporation (BMC) has halted supplies to construction sites and swimming pools, and tightened restrictions on commercial users. Predictably, the politicians blame a delayed monsoon. But blaming the weather alone is convenient and wrong. Mumbai’s water woes are not merely a meteorological problem but the result of decades of political complacency and administrative neglect.

Mumbai receives roughly 2,000 mm of rainfall annually. Few global cities are blessed with such abundance. Yet, every year the city oscillates between flooding and scarcity, unable to capture excess water when the skies open and unable to conserve enough when they do not.

Mumbai consumes around 4,000 million litres of water daily. More than 900 million litres of treated water reportedly disappear through leakages and illegal connections every day. Non-revenue water losses have climbed above 30 percent, substantially higher than they were fifteen years ago. In other words, the city loses more water through inefficiency than the size of its official supply deficit.

Instead, successive administrations have preferred to search for another reservoir farther away. From Vihar in the nineteenth century to Tulsi, Tansa and eventually the Vaitarna system, the city’s answer to rising demand has always been to extend its hydraulic empire.

Such an approach may have worked when Mumbai was smaller. Today, it looks increasingly fragile in an era of climate volatility as a weak monsoon now threatens millions.

Meanwhile, local water sources have been allowed to decay. The Mithi River, once a functioning ecosystem, has become an open drain carrying untreated sewage and industrial waste. Wetlands that naturally stored and filtered water have steadily shrunk under developmental pressure. Wells and ponds that historically provided resilience have largely disappeared from public policy.

The tragedy is that Mumbai possesses solutions that it refuses to deploy at scale.

Rainwater harvesting has been mandatory for many buildings for more than two decades. Yet enforcement remains patchy enough for corporators to demand audits of compliance.

Wastewater reuse offers another missed opportunity. Mumbai treats only a fraction of the sewage it generates. The city that pioneered industrial water recycling in India during the 1960s has somehow failed to make reuse central to its twenty-first-century water strategy.

India’s financial capital cannot continue treating every dry spell as an unforeseen emergency. Climate change will make rainfall even more erratic in future. In truth, Mumbai does not suffer from a lack of water. It suffers from a lack of imagination. Until politicians focus less on announcing new projects and more on reviving wetlands, harvesting rain and recycling wastewater, every monsoon will remain a gamble.