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Kānke, a city within the state of Jharkhand, India, occupies a geographically complex position at coordinates 23.4348°N, 85.3206°E. Situated on the Chota Nagpur Plateau, the terrain is predominantly undulating, characterised by hills and valleys. This plateau, rich in mineral resources, contributes significantly to the region’s industrial activity, and consequently, its air quality challenges. Kānke’s elevation, averaging around 650 meters above sea level, influences atmospheric circulation and can contribute to temperature inversions, trapping pollutants. The city is not directly adjacent to major bodies of water, though smaller rivers and streams dissect the landscape, providing limited natural dispersion of airborne particles. Surrounding Kānke are extensive agricultural lands, primarily focused on rice cultivation, and burgeoning industrial zones related to mining and steel production. The urban-rural gradient is relatively sharp, with a rapid transition from densely populated areas to agricultural fields and forested hills. This proximity to both industrial and agricultural sources, combined with the plateau’s topography, creates a unique set of conditions impacting air quality. Dust from agricultural practices, emissions from industrial processes, and vehicular pollution all contribute to the city’s air pollution profile. The prevailing winds, influenced by the monsoon patterns and regional topography, play a crucial role in pollutant dispersal, or lack thereof.

Kānke experiences a distinct wet and dry season, heavily influencing its air quality. The dry season, roughly from November to April, sees consistently poorer air quality. Lower humidity and stagnant air masses allow pollutants to accumulate, exacerbated by increased dust from construction and agricultural activities. January and February are typically the worst months, with temperature inversions frequently trapping pollutants near ground level. During the monsoon season, from June to September, rainfall effectively washes away many pollutants, leading to a significant improvement in air quality. However, increased humidity can also promote the formation of secondary pollutants. October and November see a transitional period, with fluctuating air quality as the monsoon recedes. The post-monsoon period can be particularly challenging as stubble burning from surrounding agricultural lands adds significantly to particulate matter levels. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season, particularly in January and February. Wearing masks (N95 or equivalent) is advisable. During the monsoon, while air quality improves, the increased humidity can trigger respiratory issues in some individuals. Monitoring local conditions and adjusting activity levels accordingly is crucial throughout the year.