Mymensingh Air Quality Index (AQI)

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Mymensingh, situated in north-central Bangladesh along the Brahmaputra River's eastern bank, occupies a strategic position within the Mymensingh Division's agricultural heartland. The city's urban character blends administrative functions with agricultural processing hubs, creating a distinct urban-rural gradient where densely populated urban cores transition rapidly into expansive rice paddies and jute fields. At approximately 19 meters above sea level on the floodplains of the Old Brahmaputra River, Mymensingh's low-lying terrain contributes to frequent waterlogging that traps pollutants near ground level. The city lies approximately 120 kilometers north of Dhaka, placing it within Bangladesh's northern industrial-agricultural belt while maintaining relative distance from the capital's extreme pollution. Surrounding landscapes feature flat alluvial plains intersected by numerous rivers and canals, including the Someshwari and Kangsha rivers to the north, which typically facilitate some pollutant dispersion but during dry periods become stagnant corridors for pollution accumulation. Proximity to the Himalayan foothills approximately 100 kilometers to the north creates a subtle topographic funnel effect that can channel air masses southward toward the city. This geographic positioning within intensive agricultural zones ensures year-round emissions from crop processing and biomass burning directly influence urban air quality, while the urban core's growing vehicle fleet and traditional brick kilns along the periphery create persistent pollution layers that interact with the region's humid climate.

Mymensingh's air quality follows a pronounced seasonal rhythm dictated by the tropical wet-and-dry climate's monsoon patterns. During the dry winter months from November through February, pollution reaches its peak as stagnant atmospheric conditions prevail. Cooler temperatures create frequent ground-level temperature inversions that trap emissions from brick kilns, agricultural waste burning, and vehicle exhaust beneath a dense lid of air, while reduced wind speeds from the northeast allow pollutants to accumulate over days. Morning fog frequently combines with smoke to create hazardous smog episodes, particularly concerning for sensitive groups like children, elderly residents, and those with respiratory conditions who should limit outdoor activity during these months. The pre-monsoon period from March to May brings rising temperatures and occasional thunderstorms that provide temporary cleansing through precipitation, though extreme heat can intensify ozone formation from vehicle emissions. The monsoon season from June to September offers the cleanest air as southwest monsoon winds from the Bay of Bengal bring vigorous ventilation and daily rainfall that effectively scrub pollutants from the atmosphere, making this the optimal period for outdoor activities. Post-monsoon October experiences transitional conditions as rainfall decreases but monsoon winds persist, maintaining relatively good air quality until November's atmospheric stagnation returns. Sensitive groups should monitor local air quality reports particularly during December and January when temperature inversions are most persistent and biomass burning emissions peak.