Yet the most telling paradox of the city’s water crisis is that New Delhi is not entirely lacking in water. The problem is distribution, hampered by a feeble infrastructure and a lack of resources, concedes Arun Mathur, chief executive of the Jal Board.

The Jal Board estimates that consumers pay no more than 40 percent of the actual cost of water. Raising the rates is unrealistic for now, as Mr. Mathur well knows. “It would be easier to ask people to pay up more if we can make water abundantly available,” he said. A proposal to privatize water supply in some neighborhoods met with stiff opposition last year and was dropped.

So the city’s pipe network remains a punctured mess. That means, like most everything else in this country, some people have more than enough, and others too little.

The slums built higgledy-piggledy behind Mrs. Prasher’s neighborhood have no public pipes at all. The Jal Board sends tankers instead. The women here waste their days waiting for water, and its arrival sets off desperate wrestling in the streets.

Kamal Krishnan quit her job for the sake of securing her share. Five days a week, she would clean offices in the next neighborhood. Five nights a week, she would go home to find no water at home. The buckets would stand empty. Finally, her husband ordered her to quit. And wait.

“I want to work, but I can’t,” she said glumly. “I go mad waiting for water.”

Elsewhere, in the central city, where the nation’s top politicians have their official homes, the average daily water supply is three times what finally arrives even in Mrs. Prasher’s neighborhood.

Mrs. Prasher rations her water day to day as if New Delhi were a desert. She uses the leftover water from the dog bowl to water the plants. She recycles soapy water from the laundry to mop the balcony.

And even when she gets it, the quality is another question altogether.

Her well water has turned salty as it has receded over the years. The water from the private tanker is mucky-brown. Still, Mrs. Prasher says, she can hardly afford to reject it. “Beggars can’t be choosers,” she said. “It’s water.”