for the USAUS-h2o project: http://www.usaus-h2o.org/

1. Perth’s Water
Supply & Demand

2. Perth’s Water Usage - Demand
• Australians are among the highest users of
water in the world, and Perth remains one of
the highest water using cities in Australia.
• Residential households are the highest users
of public water, using around 71% of water
supplied from the Integrated Water Supply
System. This means that households have the
greatest potential to save water.

3. Residential Water Use in Perth

4. Perth’s Water
Sources -
Supply

5. Desalination
• http://www.watercorporation.com.au/D/desal
ination.cfm?uid=5463-2043-3200-6815
• http://www.youtube.com/watch?feature=play
er_embedded&v=2dwjYr1anyw

6. Rainwater inflow into Perth Dams

7. Our Current Dam Storage Levels

8. Catchments
• http://www.watercorporation.com.au/R/rainf
all.cfm?uid=2642-8368-3500-3610

9. Groundwater
• Groundwater is derived from rain which
percolates down through the soil or fractures
in rock, filling up the pores between sand
grains or the fissures in rocks. Anything from
none to half of the rainfall in a given area may
reach the water table and thus recharge the
groundwater.
• Approximately 35-50% of the water supplied
to Perth comes from groundwater supplies.

10. Aquifers
• Geological formations such as those
composed of sand, sandstone and limestone
which contain useable quantities of
groundwater are called aquifers.
– The Gnangara mound occurs to the north of city
– Jandakot mound occurs to the south
– Yarragadee, which is often greater than 1000
meters thick

11. Water Treatment
• Treated groundwater is pumped from wellfields to
groundwater treatment plants
• Treated to make it suitable for drinking before
distribution to customers
• Before being added to the distribution system.
• Treatment usually involves aeration, settling of
suspended solids and filtration.
• Both surface water and groundwater are treated with
chlorine for disinfection. Fluoride is also added to
provide dental health protection in accordance with
Department of Health requirements.

12. Reducing Demand
& Increasing Supply
• Water recycling is an essential part of maintaining a
reliable, sustainable and safe water supply for Western
Australia.
• Increasing the amount of water that is recycled
is crucial to managing our precious drinking water
resources efficiently and making the most of our
wastewater resource that is often 'wasted water'.
• By 2060, the Water Corporation intends to:
– Reduce water use by 25%;
– Increase wastewater recycling to 60%; and
– Develop up to 100 gigalitres of new sources.

13. Our Blue Planet
• http://www.recycledwater.com.au/