Groundwater baseline quality / W. M. Edmunds and P. Shand -- Baseline inorganic chemistry of European groundwaters / P. Shand and W. M. Edmunds -- Organic quality of groundwaters / D. C. Gooddy and K. Hinsby -- Geochemical modelling of processes controlling baseline compositions of groundwater / D. Postma ... [et al.] -- Timescales and tracers / R. Purtschert -- Dating examples in European reference aquifers / R. Purtschert, J. Corcho-Alvarado and H. H. Loosli -- Identifying and interpreting baseline trends / M. Van Camp and K. Walraevens -- Monitoring and characterisation of natural groundwater quality / M. T. Condesso de Melo ... [et al.] -- Natural groundwater quality : policy considerations and European opinion / E. Custodio, P. Nieto and M. Manzano -- Chalk aquifer of Dorset, UK / Groundwater baseline composition and geochemical controls in the Doñana aquifer system, SW Spain / M. Manzano ... [et al.] -- Aveiro Quaternary and Cretaceous aquifers, Portugal / M. T. Condesso de Melo and M. A. Marques da Silva -- Neogene Aquifer, Flanders, Belgium / M. Coetsiers and K. Walraevens -- Miocene aquifer of Valréas, France / F. Huneau and Y. Travi -- Miocene sand aquifers, Jutland, Denmark / K. Hinsby and E. Skovbjerg Rasmussen -- Tracer based study of the Badenian Bogucice Sands aquifer, Poland / S. Witczak ... [et al.] -- Cambrian-Vendian aquifer, Estonia / R. Vaikmäe ... [et al.] -- Cenomanian and Turonian aquifers of the Bohemian Cretaceous Basin, Czech Republic / T. Paces ... [et al.] -- Quality status of the Upper Thracian Plio-Quaternary aquifer, South Bulgaria / M. Machkova ... [et al.] -- Mean sea level aquifer, Malta and Gozo / J. Mangion and M. Sapiano -- Natural inorganic chemical quality of crystalline bedrock groundwaters of Norway / B. Frengstad and D. Banks -- Natural groundwater quality-- summary and significance for water resources management / W. M. Edmunds and P. Shand