Western Australia’s drying climate and its nation-leading, 2.1 per cent per annum pace of population growth, threatens viability and sustainability

Peter Strachan – SPA National President: 0412 400 952

Michael Bayliss – SPA Communications Manager: 0423 701 611

• Rainwater runoff into Perth’s dams has become almost immaterial, forcing increased reliance on energy intensive desalinated water and ongoing over-pumping of ever deeper aquifers.
• In 2024-25 Perth’s Integrated Water Supply Scheme (IWSS) supplied a total of 337 billion litres of water to customers.
• After subtracting summer evaporation losses, a desperately dry 2026 autumn and winter means that Perth’s rainfall collection will struggle to supply 3 per cent of Perth’s total IWSS water consumption needs this year.