Let's get rid of Non-revenue water (NRW) from National Water Supply and Drainage Board (NWSDB)

Non-revenue water (NRW) might be referred to as the gap between the amount of water that's placed into a water system and therefore the volume of water that's beaked as licensed consumption. NRW could be a major concern to any or all the water utilities around the world since it affects water distribution systems. apart from a restricted range of Asian cities, several cities have visage this development severely. Colombo is taken into account because the industrial capital of the state and presently, the NRW proportion of Colombo town has exceeded 52% that indicates that from the entire quantity of water equipped to the Colombo town, quite 52% of the water that is equipped won’t generate revenue to the National Water Supply and Drainage Board (NWSDB).

These issues square measure thanks to the complexness of this pipeline system NWSDB faces such a big amount of issues particularly once it involves the upkeep and repairing of those pipeline systems. With fast urbanization, the availability of safe drinks to urban communities has become a very important and difficult task of governments in developing countries. In-state, water to urban areas as well as Colombo town is provided by NWSDB. NWSDB spends giant amounts of cash annually to supply and distribute safe drink to the entire state NWSDB has metered all water connections and charges a fee from every water consumer, supported the water volume they consume. However, some of the water produced by the NWSDB is lost within the water system. This can be referred to as Non-Revenue Water (NRW) as there's no revenue generated for the water loss within the system. several urbanized Asian cities, as well as Colombo, have high NRW levels inflicting a giant loss of revenue to water operators. thence it ought to be thought of as a significant national downside.

NRW will happen via many suggests that they can be listed as,

·       Physical losses

·       Commercial losses

·       Unbuilt licensed consumption

 Following ways were wont to cut back the generation of NRW,

·       Replace the system input volume (SIV) meters with magnetic force meters for remote reading.

·       Rehabilitation of the water distribution network by replacement forged iron (CI) pipes, larger diameter pipes, reinforcing pipes, and more.

·       Replacement of defective water meters. (Bulk meters and shopper meters)

·       Calibration and change of the GIS network.

·       Implement Active outpouring management policies, speed, and quality of the repairs.

·       Pressure management inside the water distribution system.

·       Introduce the District Metered space system bit by bit.

·       Attend the criticism terribly effectively.

NRW generation won't solely occur throughout the distribution of water to the top customers by the accountable authorities. It may occur throughout the storage of water and whereas distributing water bulks through the reservoirs. Even the conduct of effective awareness programs inside the society will increase the amount of NRW proportion reduction.

Written by

 Thasfiha M. A. J. F

Undergraduate, Department of Civil and Environmental Technology

University of Sri Jayewardenepura.