Abstract: Microbial load in air over municipal waste dumpsite and its environ was assessed using sedimentation or settle plate method. The numbers of viable microbial cells extracted from the dumpsite project site atmosphere ranged between 64 cfu/15minutes and 16 cfu/15minutes for bacteria, 39 cfu/15minutes and 1 cfu/15minutes for coliforms and; between 77 cfu/15minutes and 13 cfu/15minutes for fungi. The values remarkably higher than results reported for other human-impacted projects in the tropics. Bacillus sp was 100% prevalence followed by E. coli with 80% prevalence. The fungal genera such as Absidia, Mucor, Penicillium, Aspergillus restrictus and Cladosporium showed 60% prevalence in the study area. The predominant fungi characterized from the old stadium project atmosphere were Absidia, Mucor, Penicillium, Aspergillus restrictus,Candida pseudotropicalis and Cladosporium; while Micrococcus, Bacillus and Staphylococcus species were the predominant bacteria species found in the project environment. Escherichia coli (faecal coliform) and S. aureus as microorganisms do not survive well in aerosols, the two isolates were predominantly detected at the dumpsite and its immediate environment, an indication that the project site and its environ are heavily impacted by humans and animals feces and wastes or that fecal wastes are also wrongly discharged at the open dumpsite.