Holistic Non-Revenue Water Reduction Program.

Non-Revenue Water (NRW) in its simplest form can be defined by the following formula:

NRW = Total Volume of Treated Water – Total Volume of Sold Water

Essentially it is the volume of water that the water utility spends money on treating and distributing that is not paid for by billed customers. The NRW level of a water utility is therefore often used as an indicator of the efficiency performance of the utility as a whole.

The implementation of NRW reduction schemes in many other places has successfully increased the headroom of available resources without the need of increasing supply volumes.Base on International Water Association (IWA) water balance we are proposing to implement a NRW reduction strategy in holistic approach in coverage area/state utilizing proven methodologies to significantly reduce the level of NRW.The proposed programnormally will be divided into two categories, they are: –

Preparation – which consisted desk study and data collection then todecide thepractical strategy suitable for the area.

1. GIS –Asset information,mapping and digitizing into existing or proposed software.
2. The setting up of the Water Balance Area (WBA), NRW Zone and Pressure Management Area (PMA)
3. Active leak detection (ALC) including advance leak detection in NRW Zone and transmission main.
4. Pressure Management Scheme.
5. Pressure Management Scheme.
6. Identifying areas for main rehabilitation and asset replacement
7. Domestic and Non-domestic meter study and replacement program
8. NRW management Software Development