Anno Pubblicazione 2017 Pubblicazione ISI Autori: Alois W Schmalwieser, Barbara Klotz, Mario Blumthaler, Hugo De Backer, David Bolsee, Rolf Werner, Davor Tomsic, Ladislav Metelka, Paul Eriksen, Nis Jepsen, Margit Aun, Anu Heikkilä, Thierry Duprat, Henner Sandmann, Tilman Weiss, Alkis Bais, Zoltan Toth, Anna Maria Siani, Luisa Vaccaro, Henry Diemoz, Giuseppe Lorenzetto, Daniele Grifoni, Gaetano Zipoli, Boyan Petkov, Alcide Giorgio di Sarra, Francis Massen, Charles Yousif, Alexandr Aculinin, Peter den Outer, Tove Svendby, Arne Dahlback, Bjørn Johan Johnsen, Julita Biszczuk-Jakubowska, Janusz Wojciech Krzyscin, Diamatino Henriques, Natasha Chubarova, Predrag Kolarž, Zoran Mijatovic, Anna Pribullova, Drago Groselj, Julia Bilbao, Juan Ramón Moreta González, José Manuel Vilaplana Guerrero, Antonia Serrano, Sandra Andersson, Laurent Vuilleumier, Ann Webb, John B O'Hagan Rivista: Photochemical & Photobiological Sciences, 16(9): 1349-1370 DOI: http://dx.doi.org/10.1039/C7PP00178A Abstract: The UV Index was established more than 20 years ago as a tool for sun protection and health care. Shortly after its introduction, UV Index monitoring started in several countries either by newly acquired instruments or by converting measurements from existing instruments into the UV Index. The number of stations and networks has increased over the years. Currently, 160 stations in 25 European countries deliver online values to the public via the Internet. In this paper an overview of these UV Index monitoring sites in Europe is given. The overview includes instruments as well as quality assurance and quality control procedures. Furthermore, some examples are given about how UV Index values are presented to the public. Through these efforts, 57% of the European population is supplied with high quality information, enabling them to adapt behaviour. Although health care, including skin cancer prevention, is cost-effective, a proportion of the European population still doesn't have access to UV Index information.