Well I know you are trying to make a difference but...
Water consumption in 2004-05 was 18 767 gigalitres. The sectors of the economy that used this water were:
* Agriculture: 65% (12 191 gigalitres)
* Household: 11% (2108 gigalitres)
* Water supply industry: 11% (2083 gigalitres)
* Other industries (including electricity and gas): 7.4% (1330 gigalitres)
* Manufacturing: 3% (589 gigalitres)
* Mining: 2% (413 gigalitres)
I doubt that we as households actually make a difference...yet may be we are in the highest bracket in terms of rates, that's how fair the system is.