This paper presents an assessment on the behavior of plain carbon steel exposure to the atmosphere of Bogota. The main climate and environmental parameters, including relative humidity (RH), temperature (T), sulphur dioxide deposition (D SO2 ) and particulate matter deposition (D PM ) were measured. Furthermore, mass loss of AISI/SAE 1006 plain carbon steel coupons was measured along one year. In this case, coupons were exposed in eight test sites located across the city of Bogota. Results show that the corrosion rate of carbon steel is less than 35 μm yr –1 after one year. It was found that the west part of the city has the greatest aggressivity, which has the highest levels of D PM and D SO2 ,related with the characteristics of the anthropogenic activities distribution across the city. A dose-response function of plain carbon steel exposure to the atmosphere of Bogota, based on RH, T and D SO2 , was obtained.