Non-revenue water

Measured leakage of water supply

Non-revenue water (NRW) is water that has been produced and is "lost" before it reaches the customer. Losses can be real losses or apparent losses. High levels of NRW are detrimental to the financial viability of water utilities, as well to the quality of water itself. NRW is typically measured as the volume of water "lost" as a share of net water produced. However, it is sometimes also expressed as the volume of water "lost" per km of water distribution network per day.

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