The EFI+ database was constructed within the EU-project "Improvement and Spatial extension of the European Fish Index (EFI+)". It has been designed to gain new knowledge and to further develop and improve new biological assessment methods to meet the needs of the Water Framework Directive (WFD). The database covers 15 European countries and contains 14 221 sites.
More information on this dataset can be found in the Freshwater Metadatabase - BF15 (www.freshwatermetadata.eu/metadb/bf_mdb_view.php?entryID=BF15).