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Key performance indicators

 

Key performance indicators - sewerage
2005/06
2006/07
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
1969
3100
1560
√
Eastern Treatment Plant – treatment/disposal  
EPA Victoria licence compliance:
  • Compliance with discharge licence
    requirements (%)
100
100
100
100
√
  • Ammonia discharged (milligrams per litre)
30
22
30
12
√
  • 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
1
0
0
√
  • 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)
18
18
16
11
√
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        
99.7
99.8
99.8
99.8
√
  • % of risk ranked 1 and 2 retail water business customers compliant with trade waste agreement       
90
90
95
89**
√ Target met      √√ Target exceeded      X Target not met

* 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.

**Target was not achieved. Melbourne Water and the retail water businesses have agreed to develop a more appropriate risk assessment framework for non-compliance as a basis for a more risk-focused key performance indicator