“…The results of these investigations are very important for understanding radon migration processes in the lithosphere and the role of groundwater as radon carrier fluid. It is also very important to recognise the role of geological structure and rock type as a source of radon dissolved in groundwater (Rama and Moore, 1984;Torgersen et al, 1989;Davis and Watson, 1990;Gudzenko, 1992;Wanty et al, 1992;Farai and Sanni, 1992;Dongarrà et al, 1995;Segovia et al, 1997;Choubey and Ramola, 1997;Sun and Semkow, 1998;De Oliveira et al, 1998;Choubey et al, 2000Choubey et al, , 2001Tricca et al, 2000;Kasztovszky et al, 2000;Virk et al, 2001;LaBrecque et al, 2002;Przylibski, 1999Przylibski, , 2000bŻ ebrowski, 1996, 1999;Przylibski et al, 2001Przylibski et al, , 2002a. On this ground, it is possible to determine areas where one may expect groundwater outflows with elevated radon concentrations.…”