Khargrām, a small town in the Murshidabad district of West Bengal, India, sits at coordinates 24.0343°N, 87.9853°E. The landscape is predominantly flat, characteristic of the Ganges Delta, with an elevation hovering around 15 meters above sea level. This low-lying terrain makes the area susceptible to localised flooding during the monsoon season. The Bhagirathi River, a major distributary of the Ganges, flows nearby, influencing humidity levels and potentially contributing to stagnant air conditions. Khargrām is embedded within a largely agricultural zone, dominated by rice cultivation, with smaller pockets of jute and mango farming. While not a major industrial hub itself, its proximity to larger industrial areas further south, like those around Murshidabad city, means it can experience pollutant transport. The urban-rural gradient is quite sharp; Khargrām represents a transition point between densely populated agricultural lands and more sparsely inhabited areas. This proximity to agricultural practices introduces seasonal biomass burning, a significant contributor to particulate matter. The town’s relatively small size and limited infrastructure contribute to localised pollution concentrations, particularly from vehicular emissions and domestic fuel burning. The flat topography hinders natural dispersion of pollutants, exacerbating air quality issues.

Khargrām’s air quality follows a distinct seasonal pattern. The post-monsoon months (October-November) often see a peak in pollution, driven by stagnant air following the monsoon’s retreat, coupled with increased biomass burning from agricultural residue disposal after the harvest. Temperature inversions during cooler mornings trap pollutants near the ground. Winter (December-February) brings consistently poor air quality, with low wind speeds and frequent fog exacerbating particulate matter concentrations from domestic heating and vehicle emissions. The pre-monsoon months (March-May) witness rising temperatures and dust storms, contributing to increased levels of coarser particulate matter. The monsoon season (June-September) generally offers the cleanest air, as rainfall washes away pollutants and higher humidity promotes particle deposition. However, increased moisture can also foster mold growth, impacting respiratory health. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit outdoor activity during October-February. March-May requires caution due to dust. Monitoring local weather patterns is crucial; avoid strenuous activity on still, foggy mornings. The monsoon offers the most favourable conditions for outdoor exercise, but be mindful of increased humidity.