The ozone gas concentration data will then be compared with the Ambient Air Quality Standards. Quality standard used is Government Regulation of Indonesian Republic 41-1999 (235 μg/Nm3). Wilcoxon Test is done to see the effect of transportation and meteorological factors has on the concentration of ozone gas. The Wilcoxon test will be performed using SPSS software. Processing Map of Padang which has been equipped with a sampling point and ozone gas concentration data at each sampling point will be processed using the Software Surfer 10.