Average duration of unplanned water supply interruptions

 

 

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We have 238 fulltime employees.

Sustainability Indicator:
Average duration of unplanned water supply interruptions

Commitment:
To restore water supply interruptions within an average of 150 minutes. We will pay affected customers $25 any time we do not restore their water supply within five hours of notification, as part of our Guaranteed Service Level system.

How we’ve performed:

Average duration of unplanned water supply interruptions

30
June 2006

30
June 2007

30
June 2008

Actual (minutes)
96
119
138
Target (minutes)
106
106
150

Total GSL payments made ($)

7,100

74,075

129,150

To minimise water loss from burst mains, a change in practice was introduced in late January 2007. Water is turned off as soon as the field operator arrives at the burst, which means that customers may be without water for longer, but it saves significant volumes of water. The change of practice has resulted in an increase in the average duration of unplanned water supply interruptions and therefore an increase in GSL payments. The 2008-09 target we will be working to is 169.8 minutes.

Looking ahead:
In light of this change in practice, a revised performance target has been determined for future years. We intend to maintain a focus on this target through real time monitoring of performance to minimise customer impacts.