WOP: EMASESA -Tirta Raharja

WOP: EMASESA -Tirta Raharja

Goklas SinagaGoklas Sinaga   March 13, 2014  


wop asiaOne of the aims of this WOP is to share in knoledge in Non Revenue Water (NRW) management


November 13, 2010 - November 24, 2012
Was the code of conduct followed?
Yes link
Did the operators sign a formal partnership agreement?
Mentor motivations
  • Corporate social responsibility
  • New opportunities/challenges for employees
WOPs facilitator


EMASESA - Mentor
PDAM Tirta Raharja - Recipient
Total number of water operator professionals/staff involved in WOP (from all participating operators)
Percent at managerial level
Percent female
Estimate the person-days the mentor(s) invested in the WOP
Estimate the person-days the recipient(s) invested in the WOP


    Type of support

Total cost of WOP ($)


  • Asset management
  • Billing and revenue collection
  • Expanding services to low income households
  • Non Revenue Water (NRW) management

I Improve the PDAM leak control policy through

II. Evaluate the ageing of the installed meters and its impact on NRW


What types of activities were carried out to help develop operator capacity?
  • Classroom training
  • On the job training
  • Site visits

Describe WOPs activities
First of all, we visit the area in order to identify assets and make work proposals to the PDMA manegerial, a work agenda was done.
The work was organiced following the next plan:
Improve the PDAM leak control policy through
a. Creating two pilot sector for the control of leaks in two specific areas, so as to show
the method for controlling leakages by sector based on minimum water flow rates at night, by using the DMA method (District Metered Area), with a view to apply this technique to the whole network.
b. Mapping the location of strategic equipment for controlling water flow rates in order to achieve the hydraulic balance of the area.
c. Managing software to achieve a quick diagnostic of the NRW in the District Metered Area.
II. Evaluate the ageing of the installed meters and its impact on NRW
With regard to the installed meters, they were fitted a long time ago and they are class B, meaning that, at low flow rates, the water supplied is not being measured accurately. To evaluate the performance of the metering equipment and see if their sensitiveness can be improved, it is proposed to install 300 class C apparatus in an area controlled by a flow meter. Thus, the water consumed by each meter can be matched against the one registered by the flow meter; then the results can be compared before and after the old meters have been replaced by the new class C meters.


Describe the overall results
As a result of the work carried out under the WOP, the NRW in the working area has decreased from 38% to 22% after the detection of 5 leaks by means of acoustic devices and their subsequent repair.
This has meant 16% saving of supplied water.
The have realised that the pipes of the other area under control was very old and have to be renew.
The replacement of class B meters by class C meters has led to increase the invoicing of the local water utility (PDMA) by 10.65%.
The reason of such increase is that small water flow rates really consumed by the clients are now being measured whilst the old meters couldn't register them.

Which factors had a positive influence on the success of your WOP?
  • Access to follow up finance
  • Accurate identification of capacity needs
  • Financing for WOPs
  • Leadership
  • Relationship of individuals
  • Suitable timeframe
  • Training

Which factors impeded the success of your WOP?
  • Inadequate understanding of capacity needs
  • Lack of commitment by one or both utilities
  • Lack of financing for WOPs
  • Lack of follow up financing
  • Lack of management commitment
  • Poor partner selection
  • Practice transfer inappropriate


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  • WOP EMASESA & Tirta Raharja - Presentation Third Global WOPs Congress
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