Sydney goes 100% dual pipe recycled water ...

Or has it?

Australia has also changed its policies, with a range of new measures. Restrictions have been introduced - on watering gardens, washing cars, filling swimming pools, etc - in the country's major cities. In Sydney, a dual water supply was introduced in 2008 - one for drinking water, another for other uses, which draws on recycled water.

See - Crucial role of water in development.

While some dual (purple) pipe recycled water has been introduced into Sydney (See - the Rouse Hill Recycled Water Scheme - covering 18,000 homes), this article implies the system is Sydney-wide.  Which it isn't ...