Although it may seem very little to some of you, it turns out that we used 268 l of water per day in the last 3-month period (average daily usage). I am a bit surprised, as it just doesn't "feel" like we use that much every day! It's almost 27 10-litre buckets.
How much mains (tap) water do you use per day? You can find this very easily - your water bill would have something like "Total water used in X days was Y kilolitres" (this is for Syd Water customers - I guess other "Waters" would give you similar info).