The International Hydrogeological Map of Europe 1:1,500,000 constitutes the only coherent general map of groundwater resources throughout Europe. Groundwater is distinguished according to productivity, aquifer rock type (porous or fissured rocks) and lithology of water-bearing strata. Moreover the map series includes the position of relevant tectonic fractures.

Annual groundwater level data are available in cases where we have received permission from a database manager to post annual groundwater level data.

Maps of aquifers and their characteristics at European Union scale, dated 1982. Total of 38 map sheets covering 9 countries (Belgium, Germany, Denmark, France, Ireland, Italy, Luxembourg, Netherlands and the UK)

The global map of transboundary aquifers (TBAs) shows the surface delineation of aquifers extending over country borders.