Recycled sewage undergoes a 7-barrier purification process to become safe drinking water through microfiltration, reverse osmosis, advanced oxidation, and other treatments. This purified recycled water meets strict health standards and is blended into dams for additional water treatment before distribution. Recycling sewage through this process provides a sustainable water source for South East Queensland and reduces reliance on rainfall amid climate change and population growth. The multi-stage treatment is highly effective at removing pathogens and trace chemicals to make the water safe for drinking.