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Savar is an industrial satellite city located approximately 24 kilometers northwest of Dhaka's city center in the Dhaka Division of Bangladesh, positioned within the vast Ganges-Brahmaputra-Meghna river delta system. Situated at coordinates 23.8482°N, 90.2577°E, this urban center occupies flat alluvial plains with minimal elevation variation, typically ranging between 1-6 meters above sea level, creating natural drainage challenges that exacerbate pollution accumulation. Savar's geographic position places it strategically along the Dhaka-Aricha Highway corridor, transforming what was once primarily agricultural land into a rapidly industrializing urban fringe characterized by textile factories, tanneries, brick kilns, and manufacturing units that form part of Greater Dhaka's extended industrial belt. The city lies adjacent to the Turag River, a tributary of the Buriganga River system, though water bodies in this region suffer severe pollution from industrial discharge. Savar's urban-rural gradient reveals a complex interface where densely populated residential areas blend with industrial zones and remnant agricultural plots, creating multiple pollution sources in close proximity. This geographic configuration—flat terrain, industrial concentration, and proximity to Dhaka's megacity pollution plume—creates a perfect storm for poor air quality, as pollutants from local industries combine with transboundary pollution carried by prevailing winds from the capital region, with minimal topographical features to facilitate dispersion. The city's location within South Asia's most densely populated river delta further compounds air quality challenges through high humidity and temperature conditions that enhance secondary pollutant formation.

Savar's air quality follows distinct seasonal patterns shaped by Bangladesh's tropical monsoon climate, though specific AQI data varies annually. During the dry winter months from November through February, pollution reaches its peak as cool temperatures create frequent temperature inversions that trap pollutants close to the ground, while calm winds from the northeast provide minimal dispersion. This period sees particularly hazardous conditions in December and January when brick kilns operate at maximum capacity for construction season, combining with vehicular emissions and industrial output to create dense smog that often reduces visibility. Sensitive groups including children, elderly residents, and those with respiratory conditions should minimize outdoor exposure during morning hours when inversion layers are strongest. The pre-monsoon period from March to May brings rising temperatures and occasional thunderstorms that provide temporary cleansing, though dust from dry riverbeds and construction sites becomes an additional pollutant. The monsoon season from June to September offers the cleanest air as heavy rainfall from the southwest monsoon literally washes pollutants from the atmosphere, with strong winds providing excellent dispersion—this represents the optimal time for outdoor activities. The post-monsoon transition in October sees gradually deteriorating conditions as rainfall decreases and pollution sources reactivate. Throughout the year, Savar experiences high humidity that enhances secondary aerosol formation, while fog during winter months combines with pollution to create health-compromising smog episodes requiring precautionary measures for vulnerable populations.