“…Encianu et al (2005) measured outdoor radon and thoron concentrations during 1994-1997 in the municipality of Bistrita. Studies were then directed towards determining inside dwellings radiation levels in uranium mining areas of Bihor (Sandor et al, 1999), Băița-Ștei (Cosma et al, 2013), in wells in Băița-Ștei (Burghele et al, 2012), in soil (Cosma et al, 2010;. Cuculeanu et al, 2011 investigated the radon concentrations in the low atmosphere and their correlations with meteorological parameters for Bacău city.…”