Non-Revenue Water (NRW) in water utilities signifies the water lost in the distribution system before reaching end-users and generating revenue. This includes losses from leaks, theft, or unauthorized uses. For water utilities in retail, minimizing NRW is pivotal for operational efficiency, cost control, and environmental sustainability. Techniques such as leak detection and infrastructure maintenance are employed to reduce non-revenue water, ensuring a higher percentage reaches customers and is appropriately billed. This effort contributes to the sustainability and financial viability of water supply systems.