De Watergroep cut its Infrastructure Leakage Index from 1.71 in 2020 to 1.23 in 2022. In the three years since, it has fallen by only 0.08, to 1.15 in 2025. The utility's milestone is 0.80 by end-2030, which requires a further fall of 0.35.
Two targets missed
The index missed its annual targets in both years for which the utility published them: 1.16 against 1.13 in 2024, and 1.15 against 1.07 in 2025. Non-revenue water still fell, by 72,000 m³ in 2025 compared with 2024 and by 2.25 million m³ compared with 2022.
Activity is up
The leakage action plan, organized around seven tracks from measurement to pressure management, is meeting most of its activity goals. Proactively detected leaks reached 1,347 by the fourth quarter of 2025, against a target of 1,150. The non-revenue water cockpit covered 86.74% of the 34,926 km network at the end of 2025. The utility repaired 9,524 leaks in 2025, the highest number ever.
Other measures lag. Only 278 of 400 planned flow sensors were live at the end of 2025, and the framework deadline has moved from December 2026 to summer 2027. The share of detected leaks repaired within 48 hours ranged from 68.91% to 75.74% across the quarters of 2025, against an aim of repairing every leak within that time.
Renewal slowed in 2025
Mains renewal, the other lever, eased in 2025. De Watergroep replaced 1.28% of its network according to its annual report and 1.25% according to its results release, both below the 1.44% of 2024, even as mains investment rose to €162.165 million from €141.475 million.
What the leakage path means for supply resilience, how the source program and the new operator shared with Farys bear on it, and which milestones to follow through 2030 are covered in the full report. The full report, Water Systems Overview: De Watergroep, is available for USD 499. For a free overview, read the De Watergroep Utility Snapshot.