This study monitored particulates, gaseous and bio-aersosol pollutants in 211 indoor sites across residential farm settlements in Southwestern, Nigeria between December 2017 to July 2018 covering dry and wet seasons. Gaseous and particulate pollutants were monitored with potable active air samplers for gaseous and particulates, and open-plate sedimentation technique for bacteria and fungi. Data were analyzed using both descriptive and inferential statistics (Duncan multiple range test) at p ≤0.05. The mean seasonal range were: CO (9.22±2.14 – 21.5±3.39 ppm), CO2 (3093.84±603.71 – 4687±1868.06 ppm), PM2.5 (9.27±5.89 – 25.44±8.99 µg/m3), bacteria (202±1.13 – 2770.24±1.27 CFU/m3) and fungi (216±1.13 – 1530.08±1.27 CFU/m3) while the temporal ranges were NO2 (0.03±0.05 – 0.11±0.14ppm), NH3 (0.05±0.05 – 0.15±0.27ppm), PM10 (15.73±7.66 – 35.82±18.28 µg/m3), bacteria (35657.6±18362.4 – 45953.2±8591.07 CFU/m3) and fungi (40477.8±21632.8 – 47913.8±22534.9 CFU/m3).The highest VOCs, NH3, CO2, PM10 and fungi were observed during the wet season while CO, CO2, SO2, TSP, PM10 and PM2.5 displayed the highest in the evening time. Mean VOCs, NH3, CO, O3, CO2, PM10, PM2.5, Bacteria and fungi showed significant variation with season while VOCs, CO, NO2, and TSP varied significantly with time. Settlements with extensive animal husbandry displayed higher NH3, TSP, PM10 and PM2.5, bacteria and fungi load in contrast to where extensive cropping is common. Further research to ascertain the species of bacteria and fungi isolated to serve as early warning system against epidemics is recommended.
Key Words: Farm settlements, Air quality, Seasonal and temporal variations, Animal husbandry