Water is a big issue in Australia

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Water Lets save every drop
The Question has been asked:- With reduced water supplies and a growing population, should Australians be letting stormwater go down the drain?
The average Australian uses 320 litres of water per day for domestic purposes. For overall per capita water usage, we are the third highest consumer in the OECD, only behind Canada and the United States.
Tapping into our stormwater Until recently, little attention has been paid to the reuse of stormwater. In most towns and cities, stormwater runs directly into a dedicated drainage system designed to carry the water away as quickly as possible into natural waterways or the ocean. In Australia, a significant volume of rainwater ends up as stormwater runoff. It is estimated in Sydney alone, 420 gigalitres of stormwater goes straight out to sea every year. That's the equivalent of almost the entire contents of Sydney Harbour By storing rainwater run-off from your roof, rainwater tanks can provide a valuable water source for flushing toilets, in washing machines, watering gardens and washing cars. Using rainwater appropriately with water efficient devices can help save the environment by: conserving our valuable drinking water and reducing the demand on our water supply reducing the amount of storm water leaving your property by minimising flooding (using your rainwater for day-to-day purposes like toilet flushing helps create space in your tank for more water the next time it rains). Water use - its best to use the water in the tank on a regular (daily) basis so there is always storage capacity available in the tank when it rains. By using the tank this way you will maximise the amount of water and money you save and reduce the amount of run-off from your roof to the storm water system.