Abstract
This study addresses the issue of water losses in drinking water distribution networks, a problem exacerbated by climate change, drought, and aging infrastructure. The research was conducted in the operational area of Frýdek-Místek, managed by Severomoravské vodovody a kanalizace Ostrava a.s., covering 59 municipalities, 1024.4 km of pipeline, and more than 32,594 service connections. The objective was to evaluate the impact of implementing the “Leakage monitor” software system (ver. 19-11-2024), which focuses on continuous monitoring of minimum night flows (Qmin), on the reduction in Non-Revenue Water (NRW). The system, deployed since 2019, enables automated data collection, remote transmission, and analysis for timely leak detection and localization using acoustic and correlator methods within district metered areas. The results confirmed a reduction in NRW from 14.6% in 2019 to 11.5% in 2024. The implementation of a “Leak monitor” has proven to be an effective tool for improving operational efficiency and ensuring both economic and environmental sustainability of water supply systems.