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Greywater use discussed by The Australian Rainwater Industry Development Group (ARID)

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The Australian Rainwater Industry Development Group (ARID)  discusses the benefits of reusing Greywater in view of the increasing pressure on finite water resources experienced in Australia.
Greywater is water that is discharged from household appliances and water using fixtures such as showers/baths, washing machines and dishwashers, kitchen and laundry sinks. It excludes water discharged from toilets, bidets and urinals (black water) .
Many large water authorities have started to implement waste water recycling schemes which will see Class A quality recycled water distributed under mains pressure to new residential and commercial areas. 
Households may also divert untreated greywater for immediate reuse, as long as there are no adverse impacts on public health or the environment, caused by greywater run-off to stormwater.  Local councils should be consulted on this matter and licensed plumbers should be used to install the diversion system (which are best restricted to low risk sources such as bath, shower and laundry rinse water). 
It is illegal to store greywater for later use in a tank (24 hr maximum storage) neither should it be discharged near ageing pipes as the greywater will flow into the stormwater system.

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