Avon Catchment Council Report for Surface Water Management and Self•Sufficiency Project – IWM006 Regional Water Demand and Target Setting November 2008 Contents Summary vi 1. Introduction 1 2. Background 2 2.1 Water Corporation Supply Regions 2 2.2 Water Corporation Supply Sources 2 2.3 Patterns of Use 3 3. Overview 5 3.1 Residential 6 3.2 Commercial and Industrial 6 3.3 Agricultural 7 3.4 Parks, Gardens, Reserves and Recreation 7 3.5 Services, Infrastructure and Amenities 8 4. Local Government Authority (LGA) Summary 9 4.1 Total Water Use 9 4.2 Mean Annual Water Use (1995 – 2007) 9 4.3 Residential Water Use 9 4.4 Farm use 9 5. Local Government Water Use 15 5.1 Shire of Beverley 15 5.2 Shire of Brookton 18 5.3 Shire of Bruce Rock 20 5.4 Shire of Corrigin 22 5.5 Shire of Cunderdin 24 5.6 Shire of Dalwallinu 26 5.7 Shire of Dowerin 28 5.8 Shire of Goomalling 30 5.9 Shire of Kellerberrin 32 5.10 Shire of Kent 34 5.11 Shire of Kondinin 36 5.12 Shire of Koorda 38 5.13 Shire of Kulin 40 61/18881/68965 i Surface Water Management and Self Sufficiency Regional Water demand and target setting 5.14 Shire of Lake Grace 42 5.15 Shire of Merredin 44 5.16 Shire of Mount Marshall 46 5.17 Shire of Mukinbudin 48 5.18 Shire of Narembeen 50 5.19 Shire of Northam 52 5.20 Town of Northam 54 5.21 Shire of Nungarin 56 5.22 Shire of Pingelly 58 5.23 Shire of Quairading 60 5.24 Shire of Tammin 62 5.25 Shire of Toodyay 64 5.26 Shire of Trayning 66 5.27 Shire of Victoria Plains 68 5.28 Shire of Westonia 70 5.29 Shire of Wickepin 72 5.30 Shire of Wongan•Ballidu 74 5.31 Shire of Wyalkatchem 76 5.32 Shire of Yilgarn 79 5.33 Shire of York 81 6. Conclusion 83 7. Forecast 86 8. References 88 Table Index Table 1 Proportion of Demand – Water use Categories 1995 • 2007 vi Table 2. National Sheep Numbers (1997 – 2006). viii Table 3 Subregional Water Use Trends • Avon River basin ix Table 4. Summary of Water Corporation Consumption by Category 3 Table 5. Wyalkatchem Population Change (Fletcher, 2008) 76 Table 6. Avon Catchment Council Investment in Water Self•Sufficiency Projects (2005 –2008) 84 Table 7. Investment from Community Water Grant 84 Table 8. Projected Investment in Community Water Grant Self•Sufficiency projects 85 61/18881/68965 ii Surface Water Management and Self Sufficiency Regional Water demand and target setting Figure Index Figure 1. Trend in Water Use vii Figure 2 Subregional • Farm Water Use Trends vii Figure 3 Subregional Residential Water Use ix Figure 4 Water Corporation Supply and Distribution Network 4 Figure 5. Total Water Use by Local Government 11 Figure 6. Average Annual Water Use per Unit Area (ML/sq km). 12 Figure 7. Mean Annual Residential Water Use as Percentage of Mean Annual Water Use. 13 Figure 8. Mean Annual Farm Water Use as Percentage of Mean Annual Water Use 14 Figure 9. Total Water Consumption in the Shire of Beverley from 1995 to 2007 16 Figure 10. Residential Water Use in the Shire of Beverley 16 Figure 11. Farm Water Use in the Shire of Beverley 17 Figure 12. Total Water Consumption in the Shire of Brookton from 1995 to 2007 18 Figure 13. Farm and Residential Water Use in the Shire of Brookton (1995 – 2007). 19 Figure 14. Total Water Consumption in the Shire of Bruce Rock 1995 to 2007. 20 Figure 15. Farm and Residential Water Use in the Shire of Bruce Rock 21 Figure 16. Total Water Consumption in the Shire of Corrigin from 1995 to 2007. 22 Figure 17. Farm and Residential Water Use in the Shire of Corrigin 23 Figure 18. Total Water Consumption in the Shire of Cunderdin from 1995 to 2007 24 Figure 19. Farm and Residential Water Use in the Shire of Cunderdin 25 Figure 20. Total Water Consumption in the Shire of Dalwallinu from 1995 to 2007 26 Figure 21. Farm and Residential Water Use in the Shire of Dalwallinu 27 Figure 22. Total Water Consumption in the Shire of Dowerin from 1995 to 2007 28 Figure 23. Farm and Residential Water Use in the Shire of Dowerin 29 Figure 24. Total Water Consumption in the Shire of Goomalling from 1995 to 2007 30 Figure 25. Farm and Residential Water Use in the Shire of Goomalling 31 Figure 26. Total Water Consumption in the Shire of Kellerberrin from 1995 to 2007 32 Figure 27. Farm and Residential Water Use in the Shire of Kellerberrin 33 61/18881/68965 iii Surface Water Management and Self Sufficiency Regional Water demand and target setting Figure 28. Total Water Consumption in the Shire of Kent from 1995 to 2007 34 Figure 29. Farm and Residential Water Use in the Shire of Kent from 1996 – 2007 35 Figure 30. Total Water Consumption in the Shire of Kondinin from 1995 to 2007 36 Figure 31. Farm and Residential Water Use in the Shire of Kondinin 37 Figure 32. Total Water Consumption in the Shire of Koorda from 1995 to 2007 38 Figure 33. Farm Water Use in the Shire of Koorda from 1995•2007 39 Figure 34. Total Water Consumption in the Shire of Kulin from 1995 to 2007 40 Figure 35. Farm and Residential Water Use in the Shire of Kulin 41 Figure 36. Total Water Consumption in the Shire of Lake Grace from 1995 to 2007 42 Figure 37. Farm and Residential Water Use in the Shire of Lake Grace 43 Figure 38. Total Water Consumption in the Shire of Merredin from 1995 to 2006 44 Figure 39. Farm and Residential Water Use in the Shire of Merredin 45 Figure 40. Total Water Consumption in the Shire of Mount Marshall from 1995 to 2007 46 Figure 41. Farm Water Use in the Shire of Mount Marshall 47 Figure 42. Total Water Consumption in the Shire of Mukinbudin from 1995 to 2007 48 Figure 43. Farm and Residential Water Use in the Shire of Mukinbudin 49 Figure 44. Total Water Consumption in the Shire of Narembeen from 1995 to 2007 50 Figure 45. Farm Water Use in the Shire of Narembeen 51 Figure 46. Total Water Consumption in the Shire of Northam from 1995 to 2007 52 Figure 47. Residential, Industrial and Farm Water Use in the Shire of Northam 53 Figure 48. Total Water Consumption in the Town of Northam from 1995 to 2007 54 Figure 49. Residential Water Use in the Town of Northam 55 Figure 50. Total Water Consumption in the Shire of Nungarin from 1995 to 2007 56 Figure 51. Farm Water Use in the Shire of Nungarin 57 Figure 52. Total Water Consumption in the Shire of Pingelly from 1995 to 2007 58 61/18881/68965 iv Surface Water Management and Self Sufficiency Regional Water demand and target setting Figure 53. Farms and Residential Water Use in the Shire of Pingelly 59 Figure 54. Total Water Consumption in the Shire of Quairading from 1995 to 2007 60 Figure 55. Farm and Residential Water Use in the Shire of Quairading 61 Figure 56. Total Water Consumption in the Shire of Tammin from 1995 to 2007 62 Figure 57. Farm Water Use in the Shire of Tammin 63 Figure 58. Total Water Consumption in the Shire of Toodyay from 1995 to 2007 64 Figure 59. Residential Water Use in the Shire of Toodyay 65 Figure 60. Total Water Consumption in the Shire of Trayning from 1995 to 2007 66 Figure 61. Farm and Residential Water Use in the Shire of Trayning 67 Figure 62. Total Water Consumption in the Shire of Victoria Plains from 1995 to 2007 68 Figure 63. Farm and Residential Water Use in the Shire of Victoria Plains 69 Figure 64. Total Water Consumption in the Shire of Westonia from 1995 to 2007 70 Figure 65. Farm and Residential Water Use in the Shire of Westonia 71 Figure 66. Total Water Consumption in the Shire of Wickepin from 1995 to 2007 72 Figure 67. Farm and Residential Water Use in the Shire of Wickepin 73 Figure 68. Total Water Consumption in the Shire of Wongan•Ballidu from 1995 to 2007 74 Figure 69. Farm Water Use in the Shire of Wongan•Ballidu 75 Figure 70. Total Water Consumption in the Shire of Wyalkatchem from 1995 to 2007 76 Figure 71. Farm and Residential Water Use in the Shire of Wyalkatchem 77 Figure 72. Total Water Consumption in the Shire of Yilgarn from 1995 to 2007 79 Figure 73. Farm and Residential Water Use in the Shire of Yilgarn 80 Figure 74 Accommodation Services, Mining and Parks & Gardens Water use – Shire of Yilgarn 80 Figure 75. Total Water Consumption in the Shire of York from 1995 to 2007 81 Figure 76. Farm and Residential Water Use in the Shire of York 82 Appendix A Summary of Shire Water Use 61/18881/68965 v Surface Water Management and Self Sufficiency Regional Water demand and target setting Summary GHD were engaged by the Avon Catchment Council to assess trends in water use at a Local Government level and to set water consumption targets within the Avon River basin. Approximately 11.5 GL of water sourced from the Water Corporation Integrated Water Supply Scheme IWSS is consumed annually within the Avon River basin. Residential and Farm water use accounted for 42% and 38% of water demand respectively for the period of monitoring (1995 – 2007).