- Drinking Water 2025 – Summary of the Chief Inspector’s report for drinking water in Wales
- Foreword
- Introduction
- Water supplies and testing
- Compliance with standards
- Learning from compliance failures
- Learning from events
- Consumer contacts
- Asset health
- Water safety planning and risk assessment
- Poly and perfluoroalkyl substances (PFAS)
- Audit programme
- Recommendations
- Enforcement
- Security and Emergency Measures Direction - SEMD
- Network and Information Systems - NIS
- Materials in contact with drinking water (Regulation 31)
- Research publications
- Whistleblowers
- Working with stakeholders
- Annex A – Number of tests carried out by companies
- Annex B – Compliance with standards
- Annex C – Compliance failures and events
Annex A – Number of tests carried out by companies
Numbers in brackets reflect the number of active works, reservoirs or zones operated by that company in the region in 2025. Some companies are permitted to carry out some tests on samples taken from supply points, rather than from consumers’ taps
| Company code | Water treatment works | Service reservoirs | Consumer taps |
|---|---|---|---|
| ALE | 0 (0) | 0 (0) | 250 (1) |
| HDC | 4,806 (6) | 14,863 (84) | 9,980 (25) |
| DWR | 66,454 (65) | 78,774 (328) | 89,050 (151) |