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Balarāmpur, nestled in the Purba Bardhaman district of West Bengal, India, occupies a geographically significant position within the fertile Gangetic plains. Located at approximately 26.24°N, 89.58°E, the city’s terrain is predominantly flat, characteristic of the alluvial landscape formed by the Hooghly River and its tributaries. The surrounding landscape is a mosaic of agricultural fields – primarily rice and jute cultivation – interspersed with small villages and scattered groves of mango and date palm trees. This close proximity to intensive agricultural zones contributes to seasonal particulate matter, particularly during harvest periods when biomass burning is common. Balarāmpur sits on the edge of the Bengal Basin, a vast sedimentary basin that influences regional weather patterns and air circulation. The city’s elevation is relatively low, around 20 meters above sea level, which can exacerbate the trapping of pollutants during periods of temperature inversion, especially during the cooler months. While not directly adjacent to a major river, the influence of the Hooghly River’s drainage basin is undeniable, impacting humidity levels and local weather systems. The urban–rural gradient around Balarāmpur is gradual, with agricultural land steadily transitioning to residential and commercial areas as one approaches the city center. The region's industrial activity, though not as extensive as in larger metropolitan areas, includes small-scale manufacturing and processing units, adding to localized pollution sources. The flat topography and prevailing wind patterns often lead to the accumulation of pollutants, particularly in areas with limited ventilation.

Balarāmpur’s air quality follows a distinct seasonal pattern dictated by the region’s monsoon climate. The monsoon season, typically spanning June to September, brings relief from accumulated pollutants as strong winds and frequent rainfall effectively cleanse the atmosphere. However, the preceding pre-monsoon months (March-May) often witness a significant deterioration in air quality. Rising temperatures and decreasing wind speeds create conditions conducive to temperature inversions, trapping pollutants close to the ground. Agricultural burning, a common practice to clear fields for the Kharif season, contributes substantially to particulate matter during this period. The winter months (November-February) are characterized by cooler temperatures and frequent fog, which further restricts atmospheric mixing and exacerbates pollution levels. Stagnant air and reduced sunlight penetration contribute to the build-up of pollutants. The post-monsoon period (October) sees a transitional phase, with improving air quality as rainfall decreases but before the full onset of winter stagnation. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon and winter months, limiting outdoor activities during peak pollution hours. Maintaining indoor air quality through ventilation and air purifiers is also advisable. The monsoon offers the most favourable period for outdoor recreation, while the transitional October month provides a window of relatively cleaner air before winter’s arrival. Understanding these seasonal variations is crucial for managing health risks associated with air pollution in Balarāmpur.