Water is something that is very misunderstood, Living in the city and turning the tap on is a very different experience than living in the country and turning it on and nothing comes out!
Water is what we are and we all depend on it as Humans, Animals Trees and anything we make or produce has an element of water in it or we use to make it.
Water does not change or get dirty or contaminated, it can carry those things and it does not change state itself. Its like the oil in your car, your oil only holds contaminants from your engine, with a good filtration process you can clean your oil up and use it again it does not breakdown it just carries excess stuff with it.
So you can reuse water over and over again for multiple purposes, and you want to get as many uses out of it at possible. For example why do we not have toilets with hand basin in the top of them that we use to wash our hands in and then that excess water is used in the toilet to flush?
wouldn’t that save us some water usage. One of the easiest things to do is catch the grey water from your washing machine or a bucket in the shower with you, have a bucket in the shower and when your done just go throw it on a fruit tree. With your washing machine just get a 60 litre bucket is the best size for a straight through system where you put a tap and hose on it and leave it open all the time and just move the hose around. Just make sure that the top of your container is lower than your washing machine overflow outlet or your machine might suck the water back in and it wont have done a proper wash. You just move the hose around from fruit tree to fruit tree on every wash and you are using the water twice. And also check that you use an eco friendly washing powder or detergent, very rarely would you get one in Australia that not.
You can also look into a proper grey water system which will be a great investment.
On top of this having a rainwater tank installed is a must, you might not be able to install one to completely look after yourself due to size constraints, on average a person will use about 200 litres per day, here is a link if you want the Australian stats . And there are some calculations you can do to work out how much water you require to be self sufficient. Normally you just work out on average how much you use daily and then find out what is the longest time in your area it doesn’t rain for. For example if there is 2 of you you use 400 litres per day and you live in Sydney and the longest time without rain on average is a about 33 days, in this example you would want about a 15000l tank, and if possible its one of those things that bigger is always better. And if you can have a few tanks to spread the risk if something was to happen to one.
Every little bit helps to save of water so just by thinking about it and being a little smarter you can help save more water, For example I get over 10 kilos of mandarins each year from my 2 trees and over 30kgs of Lemons, and the only water they get in grey water and some water when it rains, its not a bad byproduct of reusing some grey water. And I will put my lemons and Mandarins in an taste test challenge you want to throw at them. My biggest problem is when people come over and have one they want to take them all home.
You could bare more fruits than saving money if you use your water wisely.