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Mushābani, nestled in the state of Jharkhand, India, occupies a geographically significant position within the Chota Nagpur Plateau. Located at approximately 22.52°N, 86.45°E, the city’s terrain is characterized by undulating hills and valleys, typical of the plateau landscape. The elevation, around 300-400 meters above sea level, contributes to localized microclimates and influences air circulation patterns. Mushābani’s surrounding landscape is a mosaic of dense forests, primarily sal and teak, interspersed with agricultural fields and small villages, creating a distinct urban-rural gradient. The city itself is relatively small, exhibiting a compact urban footprint with a mix of traditional dwellings and newer constructions. While not directly adjacent to a major river, the region receives significant rainfall during the monsoon season, impacting humidity levels and influencing atmospheric stability. The proximity to the industrial belt of Bokaro Steel Plant, roughly 80 kilometers to the north, is a crucial factor affecting air quality, as industrial emissions can be transported by prevailing winds. Agricultural practices in the surrounding areas, including the burning of crop residue after harvest, also contribute to seasonal pollution episodes. The plateau’s topography can trap pollutants, particularly during periods of low wind speed, exacerbating local air quality challenges. The gradual transition from forested areas to agricultural land and then to the urban core of Mushābani shapes the city’s environmental profile and its vulnerability to air pollution.

Mushābani’s air quality experiences a distinct seasonal cycle dictated by the region’s tropical climate. The dry season, spanning roughly October to May, is typically characterized by lower rainfall and increased temperatures. This period often witnesses a build-up of pollutants due to reduced atmospheric cleansing by precipitation. Temperature inversions, common during the cooler months (November-February), trap pollutants near the ground, leading to periods of stagnant air and potentially elevated concentrations of particulate matter. Agricultural burning, prevalent immediately after the monsoon harvest in October and November, significantly contributes to this pollution. The monsoon season (June-September) brings relief, with frequent rainfall washing away pollutants and strong winds dispersing them. However, the monsoon also introduces humidity, which can exacerbate respiratory issues for some individuals. Fog, common during the winter months, further restricts air movement and traps pollutants. March and April often see a rise in dust and pollen levels, impacting those with allergies. During the hotter months (April-May), stagnant air and high temperatures can worsen ozone formation. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should exercise caution during the dry season, particularly during periods of fog or temperature inversions. Outdoor activities are generally more favourable during the monsoon months, although humidity should be considered. Avoiding strenuous activity during peak pollution episodes is advisable for all residents.