Kaduna town is situated at 10.52° North latitude, 7.44° East longitude and 614 meters elevation above the sea level. Kaduna is a very large town in Nigeria, having about 1,582,102 inhabitants. Sampling sites 1 is within Sabon Tasha, under Chikun local government area and also sampling site 2 is Ungwan Romi which is from Kaduna south local government area while sampling site 3 is within Kakuri which is under Kaduna south local government area. The residential and industrial area for the three sampling sites will be analysed for the CO concentration respectively as shown in fig 2.map of Kaduna metropolis .