Data Set 1: This is the data showing bioaerosols particle size distribution at Olusosun dumpsite at the varoius sampling locations on the dumpsite. Data set 2:This shows the details of the activity based sampling as discussed in the publication and how the final results were derived. Data Set 3: Bioaerosols concentration in the ambient air across the dumpsite. This is shown for Total bacteria, Gram-negative bacteria and Aspergillus fumigatus. Dataset 4: Shows the bioaerosols concentration per location per sampling visit.