Natarajan is a one-man army, who is trying to make a dent in that ocean.
He has earned the epithet of being Delhi’s "Water Man" because in a single day, he delivers 2,000 litres of potable water to the city’s urban power.
Watchmen, household help, rickshaw pullers and children from a nearby slum began frequenting his house at all hours of the day to make use of the clean water.
"I live in an affluent area.
What does it cost to give people water?
That one pot has multiplied to 60.
Every morning, Natarajan wakes up at 4.30am, gets into his modified van with a huge water tank where the seats should be and makes his first water run.
Natarajan feels he still has a long way to go before he can make a difference.
He said: "My voice is not loud enough yet – it needs to be much more forceful.
His dream is that one day all homes in Delhi will keep a pot of water outside to help the poor.