Spatial Variation of PM₁, PM2.5, and PM₁₀ Linked to Urban Land Use in Lalmonirhat, Bangladesh

This study aims to assess the concentration of Particulate Matter (PM₁, PM2.5, and PM₁₀) in relation to various land uses in Lalmonirhat district town. Study conducted this investigation in 32 sites within Lalmonirhat district town, using a portable Air Quality Monitor and an Indoor Outdoor Formaldehyde (HCHO) Detector (Model: DM106). The average concentrations of PM₁, PM2.5 and PM₁₀ are 51.92, 85.93, and 109.52 µg/m³, respectively. The average concentration of PM2.5 (109.65 µg/m³) in various land uses was observed to be elevated in industrial areas, exceeding the acceptable level by a factor of 2.19. The average PM2.5 / PM₁₀ ratio is assessed at 78.38%, whereas the PM₁/PM2.5 ratio is 60.3%. The alterations in the concentration of all investigated factors between land uses were negligible. The results of this research indicate that the examined land uses are ranked in descending order of average PM2.5 concentration as follows: industrial area, village area, road intersection area, sensitive region, residential area, mixed area, and commercial area.