Water consumption is dependent on the occupants lifestyle – Are they running a business or a domestic house, are they single or multi person occupancy or is the house continuously occupied or a holiday home. So while I cannot provide a definitive value on what you should be consuming, the following may help you calculate your own usage.
Here are some common places where water is used around the house – and an estimate of how much water is used with each activity. We have used an example of a 3 adult household
Flushing the Toilet: A standard flush = 8 liters
Flushing 5 times daily will use 16380 liters a year.
A household of 3 adults flushing 5 times a day each will use up 43680 liters.
Washing Machine: Typical water usage for a load is 65 liters.
Using a washing machine 4 times every week will use 13520 liters a year.
Dishwasher – typically uses 20 liters a load but some efficient models can use as little as 10 liters a load. Running a typical dishwasher once every day will use about 7000 liters of water.
Washing Dishes by Hand : Washing the equivalent of a full dishwasher load by hand can use as much as 49 liters of water. Doing this every day would use 18000 liters a year.
Showers – are one of the biggest users of water in most homes. Some power showers can operate at a flow rate of 16 liters per minute – so in 10 minutes you would get through 160 liters. Do that every day – and you would use 58000 liters of water a year.