Air sampling stations were established in three stations at a dumpsite and two control stations within Uyo urban to determine the effects of urban wastes on the quality of air in the city. The air quality parameters determined in situ were; carbon monoxide (CO), Hydrogen sulphide (H2S), Sulphur dioxide (SO2), Nitrogen oxide (NO2), etc. All gaseous concentrations were recorded in ppm. The microbiological air quality at the waste dump site was evaluated by using settling technique, also known as sedimentation technique. Results of laboratory analysis show that for all the sampling locations at the dumpsite, the numbers of mesophilic aerobic bacteria and yeasts and molds obtained by the sedimentation technique were higher than APHA’s standard (30 cfu/15 mins) for settling technique. Also, the mean concentrations of H2S gas were high and varied between 0.02 ppm and 0.5 ppm recorded at the dumpsite. The concentrations of NO2 were equally high (0.06 ppm 0.1 ppm) at dumpsite. The concentration of NH3 varied between 2 ppm and 6 ppm in the dumpsite. The mean SO2 values were low throughout the study area. Comparison of the overall mean concentrations of the gases with FEPA guidelines shows that the area is heavily polluted by the following gasesNO2, H2S and NH3. The study highlights the need for a sustainable municipal waste management strategy.