The Copernicus Emergency Management Service (CEMS) Hydrological Data Collection Centre (HDCC) is responsible for the collection, quality control, harmonisation and internal distribution of hydrological observations (river discharge and water level; reservoir inflow, outflow, water level and stored volume) for both the CEMS European Flood Awareness System (EFAS) and the Global Flood Awareness System (GloFAS). The Joint Research Centre (JRC) of the European Commission is the entrusted entity for the management, technical implementation and evolution of CEMS EFAS and GloFAS. Ghenova Digital is the designated contractor responsible for implementing the operational functionalities of the CEMS HDCC. This report contains an analysis of the hydrological data collected throughout 2025 and of the previously stored data, alongside a description of the data-collection and quality-control protocols employed. In 2025, 56 data providers contributed with near real-time discharge and/or water level data to CEMS EFAS, for a total 3,496 hydrological stations, covering 33 countries and 57.3% of all European water basins. Reservoir data collection within the European domain continued in 2025: 12 data providers contributed with historical and/or near real-time reservoir data, for a total of 1,079 reservoir stations. Collection of historical discharge data for the global domain (CEMS GloFAS) was enhanced by the inclusion of 2,135 new stations, for a total of 10,738 stations.

GARCIA PADILLA Mercedes;  GARCIA SANCHEZ Rafael;  JIMÉNEZ MOLINA Antonio;  GONZÁLEZ MARTÍN Marina;  SERRATOSA MÁRQUEZ Alejandro;  DISPERATI Juliana;  D'ANGELO Claudia;  SALAMON Peter; 

2026-09-25

Publications Office of the European Union

JRC147959

978-92-68-43562-5 (online),   

1831-9424 (online),   

EUR 40855,    OP KJ-01-26-390-EN-N (online),   

https://publications.jrc.ec.europa.eu/repository/handle/JRC147959,   

10.2760/0927755 (online),