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Hāngal, a town nestled in the Dharwad district of Karnataka, India, occupies a geographically significant position within the northern Maidan region. Its coordinates (14.7646° N, 75.1246° E) place it on a gently undulating plateau, part of the Deccan Plateau's northern fringe. The terrain is predominantly agricultural, characterized by fertile black soil ideal for crops like sugarcane, paddy, and groundnuts, creating a strong rural-agricultural gradient surrounding the town. Hāngal sits at an elevation of approximately 531 meters (1742 feet) above sea level, influencing local weather patterns and potentially affecting pollutant dispersion. The town is not directly adjacent to any major river or lake, though smaller seasonal streams traverse the area, impacting local microclimates. To the east, the landscape gradually rises towards the Western Ghats, a significant barrier influencing wind patterns and trapping pollutants under certain meteorological conditions. The proximity to Dharwad, a larger urban centre approximately 25 kilometers away, introduces a degree of industrial influence, with occasional transport of pollutants from that region. The surrounding landscape is a mosaic of agricultural fields, interspersed with groves of mango and other fruit trees, contributing to a relatively green environment, though agricultural burning during harvest seasons can significantly impact local air quality. The urban character of Hāngal is primarily residential and market-oriented, with limited heavy industry, meaning local emissions are largely from vehicular traffic and domestic sources, compounded by regional agricultural practices.

Hāngal's air quality follows a distinct seasonal pattern dictated by the region's tropical climate. The dry season, typically spanning from March to May, presents the most challenging period. High temperatures and minimal rainfall create stable atmospheric conditions, frequently leading to temperature inversions where cooler air becomes trapped beneath a layer of warmer air. This inversion prevents the vertical dispersion of pollutants, resulting in elevated concentrations, particularly during the hottest part of the day. Agricultural burning, a common practice during post-harvest periods (April-May), significantly exacerbates this issue, releasing particulate matter and other harmful gases. The monsoon season (June-September) brings relief, with frequent rainfall washing away pollutants and strong winds dispersing them. However, heavy rainfall can also lead to increased humidity and stagnant air conditions at times. The transitional periods of October-November and February-March are generally milder, with moderate wind speeds and temperatures, offering relatively better air quality. Fog, common during the cooler months (December-January), can trap pollutants near the ground, creating localized pockets of poor air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, limiting outdoor activities during peak pollution hours and considering the use of air purifiers indoors. During the monsoon, while overall air quality improves, those with pollen allergies should remain vigilant.