| CEC | Contaminant of emerging concerns |
| AI | Artificial intelligence |
| BOD | Biochemical oxygen demand |
| COAG | Committee for Agriculture |
| DAC | Development Assistance Committee |
| EIA | Environmental Impact Assessment |
| EPOC | Environment Policy Committee |
| EPR | Extended Producer Responsibility |
| E-PRTR | European Pollutant Release and Transfer Register |
| ERSAR | Water and Waste Services Regulation Authority (Portugal) |
| EU | European Union |
| GIS | Geographic Information System |
| HLRF | High-Level Risk Forum |
| IBT | Increasing block tariffs |
| ICT | Information and communication technology |
| JWPAE | Joint Working Party on Agriculture and Environment |
| NbS | Nature-based solutions |
| O&M | Operation and maintenance |
| OFWAT | Water Services Regulation Authority (United Kingdom) |
| PGC | Public Governance Committee |
| RBMP | River basin management plan |
| RDPC | Regional Development Policy Committee |
| RPC | Regulatory Policy Committee |
| RTA | Relative technological advantage |
| SDG | Sustainable Development Goals |
| SEA | Strategic Environmental Assessment |
| TMDL | Total Maximum Daily Load |
| TUAC | Trade Union Advisory Committee |
| UK | United Kingdom |
| US | United States |
| UWWTD | Urban Waste Water Treatment Directive |
| WFD | Water Framework Directive |
| WGI | Water Governance Initiative |
Toolkit for Water Policies and Governance
Converging Towards the OECD Council Recommendation on Water
