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Key performance indicators

 

2006/07
2007/08
Target
Result
Target
Result
Target met
Western Treatment Plant – treatment/disposal  
EPA Victoria licence compliance:          
  • Compliance with discharge licence
    requirements (%)
100
100
100
100
√
  • Offensive odours beyond the boundary (number)
0
0
0
0
√
  • Nitrogen discharged to Port Phillip Bay (tonnes)
3100
1560
3100
1239
√ √
Eastern Treatment Plant – treatment/disposal  
EPA Victoria licence compliance:
  • Compliance with discharge licence
    requirements (%)
100
100
100
100
√
  • Ammonia discharged (milligrams per litre)
30
12
5
2.4
√ √
  • Offensive odours beyond the boundary (number)
0
0
0
0
√
  • No litter
0
0
0
0
√
Sewerage transfer
 
EPA Victoria SEPP compliance for
sewerage system spills.
  • System failure - zero spills due to sewerage system failure (number)
0
0
0
1*
X
  • Hydraulic deficiency - progressively achieve zero spills due to storm events of a severity of up to
    1-in-5 years by 2011 (number)
0
0
0
0
√
Complaints relating to transfer system odour (number) (cumulative)
16
11
11
8
√ √
Biosolids management
 
Maximise sustainable reuse of biosolids
  • % of biosolids reused annually at ETP
100
0
100
0**
X
  • % of biosolids reused annually at WTP
33
0
33
0**
X
Trade waste
 
Work with retail water businesses to improve trade waste management:          
  • % of retail water business trade waste customers compliant with trade waste agreement        
  • Number Of High Risk Non-compliant Trade Waste Discharges To Melbourne Water’s Sewerage System       
N/A
N/A
0
0***
√
√ Target met      √√ Target exceeded      X Target not met

* Target was not achieved due to the failure of an air valve at Mordialloc No. 1 pump station in April 2008. Scheduled maintenance has been arranged for all air valves on the rising main.

** Targets were not achieved. The non-typical properties of Melbourne Water biosolids, such as clay at the Eastern Treatment Plant and heavy metal contamination at the Western Treatment Plant, constrain the opportunities for sustainable use. It is anticipated that reuse of biosolids from ETP will proceed upon release of guidelines for the environmental management of projects using biosolids as a fill.

*** This indicator consolidates the two trade waste indicators used in last year’s Sustainability Report.