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India's urban water crisis is here. What will it take to fix it?

Chennai went thirsty in 2019. Bengaluru grappled with water scarcity that affected thousands in 2024. Delhi fights over its share of the Yamuna every summer. From Bengaluru to Delhi to Chennai and to other urban regions across India, water is increasingly becoming a dwindling resource. This crisis is unfolding, city by city, putting stress on households and businesses. But the question of possible solutions still remains. A new study, published in the journal Earth's Future, might offer some hope. Researchers at Stanford University have provided a blueprint for how fast-growing Indian cities can avoid catastrophe. The team behind the study formulated a plan by using Pune as a test case. They built a detailed model of how water supply, demand, and policy choices interact. But the lessons they draw are meant for every Indian megacity in the making. "We now have a framework that cities around the world can adapt as urban populations surge, cities expand, and climate pressures intensify," said senior author Steven Gorelick. By 2050, one-third to almost half of the global urban population is projected to face water scarcity, with a significant number living in India. Five Indian cities, including Delhi, Kolkata, Chennai, Bengaluru, and Hyderabad, are already among the world's 20 most water-stressed cities. The reasons are familiar behind the dry state of the urban centres. The blame lies with decades of unregulated groundwater extraction, ageing pipelines, shrinking lakes, erratic monsoons, and rapid urban sprawl. To not have water to drink or to bathe or wash clothes or water plants, are all a worrying prospect, A NITI Aayog report had warned a few years back that by 2030, 40 percent of India's population may not have access to drinking water. The burden falls the hardest on those who can least afford it. In cities like Bengaluru, residents in poorer neighbourhoods are entirely dependent on tanker water, which is very expensive. The Stanford study puts a precise number on this inequality. It notes that without intervention, low-income residents in fast-growing cities could spend nearly one-fifth of their income just to access water, and still receive less than half of what is needed for basic health and hygiene. The researchers found that no single fix is enough. Plugging leaks, cracking down on water theft, raising tariffs for heavy users, capping borewell extraction, all of these solutions help a little, but are not enough alone. The real gains come from combining interventions. The most powerful single policy, the study found, would be to allow farmers to legally sell their irrigation water to urban households through regulated tanker networks. This alone could cut water costs for the urban poor from 18% to just 4% of income. Crucially, the researchers found that fixing the crisis does not require a dramatic boost in supply. If proper policy interventions are adopted, all residents could gain access to at least 40 litres of water per day with only about a 1% increase in the total water supply. "We discovered important synergies that identify unseen improvements in equality of water supply and access. This enables planners and policymakers to efficiently achieve their goals," said lead author Ankun Wang, a PhD student at the Stanford Doerr School of Sustainability. For India, where city after city is racing toward megacity status with creaking infrastructure and shrinking aquifers, the message is urgent. It says that solutions exist, and that the water is only just enough. But it warns that if policies are not created and enforced urgently, the country could be staring at a crisis that could affect millions.

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