| API | Application Programming Interface |
| ASR | Aquifer Storage and Recovery |
| CE | Circular Economy |
| CoP | Community of Practice |
| DAP | Data Application Products |
| EDI | Electrodeionization |
| EDR | Electrodialysis Reversal |
| EIs | Expected Impacts |
| ENoLL | European Network of Living Labs |
| ETV | Environmental Technology Verification |
| FAIR | Findable, Accessible, Interoperable, Reusable |
| FIWARE | Open Source Platform Smart Digital Future |
| FO | Forward Osmosis |
| GIS | Geographic Information System |
| ICT | Information and Communications Technology |
| INALL | European Innovation Alliance |
| I/O | Input/Output |
| IoT | Internet of Things |
| IPR | Intellectual Property Rights |
| ISO | International Organization for Standardization |
| JSON | JavaScript Object Notation |
| JSON-LD | JavaScript Object Notation Linked Data |
| KPI | Key Performance Indicator |
| LCA | Life Cycle Assessment |
| LCC | Life Cycle Costing |
| LL | Living Lab |
| MAR | Managed Aquifer Recharge |
| NBS | Nature-based solutions |
| NF | Nanofiltration |
| NGSI | Next-Generation Sensors Initiative |
| PRO | Pressure Retarded Osmosis |
| QMRA | Quantitative Microbial Risk Assessment |
| RO | Reverse Osmosis |
| RR | Resource Recovery |
| RRF | Responsible Reuse Framework |
| SCADA | Supervisory Control and Data Acquisition |
| SDG | Sustainable Development Goals |
| SSH | Social Sciences and Humanities |
| STEM | Science, Technology, Engineering, Maths |
| TP | Technology Products |
| TRL | Technology Readiness Level |
| ToR | Terms of Reference |
| UF | Ultrafiltration |
| UWOT | Urban Water Optimisation Tool |
| WP | Work Package |
| WPC | Water Production Centre |
| WRRF | Water Resource Recovery Facility |
| WWTP | Wastewater Treatment Plant |
| ZEN | Zero Emission Neighbourhood |
