The influence of Montreal Protocol legislation accepted by Polish Authority (in 2002) on concentration halogenated compounds (CFCs) in the atmosphere was observed. We present measurements made on atmospheric concentrations of seven halogenated compounds (freons F-11, F-12, F-113, chloroform, 1,1,1-trichloroethane, carbon tetrachloride, and sulphur hexafluoride) between 1997 and 2008 from the densely polluted urban area of Kraków. The trend coefficients are calculated for the mean daily data measurements obtained at the Kraków stations (50ºN, 20ºE) using weighted regression method. The concentration of F-11, chloroform, 1,1,1-trichloroethane, and F-12 has a tendency to decrease, whereas F-113, carbon tetrachloride, and sulphur hexafluoride tend to increase. The results of the trend coefficient calculations expressed in ppt/year are F-11, -3.2; F-113, +0.4; CHCl₃, -1.3; CH₃CCl₃, -3.5; CCl₄, +1.9; F-12, -0.6; and SF₆, +0.22. The result of the measurements, particularly after 1 July 2002, shows a decrease in concentration of the mentioned compounds. This suggests that the Montreal Protocol limitations of CFC emissions are respected in Central Europe, especially in Poland, where those limitations have been in place since July 2002.