Some newspaper reports (Hindu, ToI) this week mentioned that:
"... water supply to Bangalore is ... 694 million litres a day ... consumption which is actually billed ... around 429 million litres a day. The unaccounted for water comes to an alarming 38.2 per cent"
Wow, 38.2 percent (quoted from Hindu)! This would include two types of losses, 1) distribution loss: damages, leakages etc, and 2) water that is not getting billed. There is no clear mention or estimates of split between the two categories. Assuming distribution loss (leaks) to be 20% (double the 10% developed world aims for, google "Water Management Act US"), 18% of water could be going unbilled. That guesswork tells us that 1 in 6 of us, Bangalore citizens, isn't paying for his/her water.