As of 2007, residents of Vancouver, on average used 295 litres of water per day (Per capita water consumption number is 542 litres per day factoring in non-residential water use).
After reading the above article, I did a bit of number crunching. The contrast in water consumption, say. between a place like Vancouver and a place like Bhopal, India is pretty striking.
In India, there are guidelines that have been put into place that have suggested a minimum of about 150 litres per day is needed to maintain appropriate living/health standards (see here, via the Central Public Health and Environmental Engineering Organisation (CPHEEO) within India’s Ministry of Urban Development).
When you happen to look at 2007 stats for Mumbai, you get a figure of about 191 litres per day per capita (which presumably also includes a heavy load from non-residential use), but there are some major cities such as Bhopal (right in the middle of India and a city with over 1.5 million residents), where the daily consumption is calculated at 72 litres per day per capita (again, this would include non-residential use). To put this in perspective, this is equivalent to just over 3 conventional toilet flushes (~67 litres).
Just in case you like to visualize what these volumes all mean, the above is an image of two fridges: one designed with a freezer/fridge compartment to hold 300L and the other to hold 70L.