Assesing nitrate groundwater hotspots in Europe reveals an inadequate designation of nitrate vulnerable zones - J. Serra, C Marques-dos-Santos, J Marinheiro, S Cruz, MR Cameira, W de Vries, T Dalgaard, NJ Hutchings, M Graversgaard, F Giannini-Kurina, L Lassaletta, A Sanz-Cobena, M. Quemada, E Aguilera, S Medinets, R Einarsson, J Garnier (Xxii N Workshop. 19-22 June, Aarhus, Dinamarca, 2024)