I have used the Household Water Use Calculator from the following website to calculate how much water my parents and I use in a week, my baby sister does not use much water at all. http://www.melbourne.vic.gov.au/rsrc/PDFs/Water/CalculatorWaterMark.pdf
1) We have a dual flush toilet so:
5 litres X 54 flushes X 3 members = 810 litres
2) We do not have a leaking toilet in our household
3) Time spent in the shower
10 minutes for dad
25 minutes for mom because she has a shower twice
10 minutes for me.
So in total we spend 45 minutes in the shower on an average day.
4) We have a low water flow AAA rated showerhead, so we use
7.5 litres X 7 days X 45 minutes = 2362.50 litres
5) My baby sister has baths at my grandmas place in the weekdays, but has 2 baths at our place on Saturdays and Sundays so
96 litres X 2 = 192 litres
6) In an average week we do 5 loads of washing
7) We have a AAA top load washing machine, not a AAAA rated front loading washing machine so
130 litres X 5 loads = 650 litres
We do save water in the kitchen for example: we rinse vegetables in a shallow sink of water and we have installed water efficient taps. We only run the dishwasher when it’s full, so we use 473 litres per week.
9) We have a small garden and we do try to save water with methods such as mulching and water efficient plants so on average my household uses 651 litres a week on the garden.
10) We do not leave the tap running when brushing our teeth so we use:
3 X 14 litres = 42 litres
11) We do not have any leaking taps.
12) Yes we apply water conservation measures for other general water uses that occur in households?
For example: We minimise using water when cleaning bathrooms and kitchens, cleaning paths, using garden water features, efficiency of air conditioning and water heaters, children playing under hoses, washing cars and hand washing clothes?
So, my household uses an average of 670 litres each week
13) We do not have a rainwater tank, or a greywater system for re-using water.
14) Yes, we have changed our household’s water usage over the past few years due to increased awareness of water scarcity such as having shorter showers and turning taps off while brushing, so we save 217 litres a week.
Total Water usage = 5850.50 Litres
Total water savings =217 Litres
Total water used in my household per week
Total Water usage 5850.50 Litres – Total water savings 217 Litres = 5633.50
Total water used by each person
5633.50 litres divided by 3 = 1877.83 litres