1. MIECF 2014 Advancements in Water Reuse in Western Australia Presented by Ashley Vincent General Manager Planning and Capability Group Water Corporation of Western Australia

2. One third of Australia’s land mass North of the State – Hot, wet, sparsely populated South of the State – Warm, moderate winter rainfalls Perth – Capital city – 1.9 million people Western Australia

3. Inflow to Perth Dams

4. Summer 2013/4 – Hot and Dry Perth

5. Water Forever Whatever The Weather

6. Looking Forward % IWSS Sources - 2012 % IWSS Sources - 2022

7. Water Recycling Journey Before 1990’s2000’s2010’s2020’s 2004 – Kwinana Water Recycling Plant 2010 - GWR trial begins Today 2022 - Full GWR Expansion 1950’s – Merredin 1992 – Albany Tree Farm 2009 – Onsite recycling 2014 – Mulataga Recycling scheme 2003 – McGillivray Oval 2000’s – Multiple regional recycling irrigation schemes 2016 – GWR Stage 1

8. Increasing Water Recycling

9. Groundwater Replenishment Trial Objectives Technical feasibility Policy and regulation Community engagement and discussion

10. Treatment Train Wastewater Treatment Water suitable for discharge to ocean Ultrafiltration – Removes: All suspended solids Crypto, giardia, all bacteria Larger virus Reverse Osmosis – Removes: All viruses All chemicals larger than a water molecule Ultraviolet Treatment Final disinfection step Guarantee of bacteria and virus removal 224 1 4

11. Groundwater Investigations Objectives Distance travelled Pressure effects Geochemical changes Water Quality 22 Monitoring Bores Background: Jan 09 – Oct 10 Ongoing sampling Online monitoring: level, pH, conductivity Geochemistry & geophysical investigations Research & Technical Reference Partners CSIRO & Curtin University DoW Hydrogeologists, Rockwater

12. Recharged Water - Distance Travelled (to 31 December 2012)

13. Community Engagement http://www.watercorporation.com.au/

14. Recycled Water for Drinking Dec 2012: Complete GWR Trial Jan 2013: Continue 1.5GL recharge to Dec 14 Stage One: 7GL pa Jun 2012: Planning & Construction Jun 2016: Recharge & abstraction Stage Two: +7 – 14 GL pa Aug 2016: Construction start Jun 2018: Recharge & abstraction Stage Three: 7 – 14 GL pa Aug 2020: Construction start Jun 2022: Recharge & abstraction

15. Recycling – Part of our Water Future