amit mishra manages the delhi facilities for a social business called sarvajal, which hopes to use reinvest it makes to sustain them over the long term so this where the water gets purified and it goes into these large storage tanks? >> yes. but not before it is treated with u.v. light, to make sure there's no biological contaminators.or >> reporter: thanks to charitable grants for the $30,000 of equipment and land given by the local government, sarvajal can charge customers a fraction of the price of commercially bottled water, which most people here cannot afford. fetching water remains a mostly female chore. it's still self service with heavy lifting. but it's a massive improvement over what most of delhi's poorer neighborhoods have. we filmed the ordeal six years ago. >> by 4:00. >> reporter: the long wait for a municipal tanker truck that has no fixed schedule, the mad dash when it finally arrives-- the city's middle class buys its way out of such chaos. jyoti sharma lives in an apartment that's hooked up to the city water supply-- betterpp off but hardly well off. >> we get water 45 m