C. Garcia-Linaresl, M. Martinez% I. Antiguedadl and J.M. Sanchez-Perez2 'Hydrogeology Group, University of the Basque Country, 48940 Bizkaia, Basque Country, Spain 2Laboratoire d'Ecologie des Hydrosystemes (LEH, FRE CNRS-UPS 2630), Universite Paul Sabatier, 31055 Toulouse, France

ABSTRACT: The Quaternary aquifer of Vitoria-Gasteiz has been recently declared by the Basque Government as a Vulnerable Zone according to the 91/676/CEE European Law related to the farming origin nitrate pollution in groundwater. This is the only aquifer in the Basque Country under this legal consideration.