Esther Wong's results :
This is taken at the start of the test-run. The water meter reading is : 30509060m^3
This is taken one week after the test-run have started.
The water meter reading is : 30539572m^3
Esther then installed her water thimbles into her taps.
A week later after she have installed the water thimbles, the water meter reading is : 30562950m^3
For the first week (without water thimbles), the amount of water used was : 30512m^3
For the second week (with water thimbles), the amount of water used was : 23378m^3
Which meant that Esther saved about 20% of water!