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Bijapur, officially known as Vijayapura, occupies a strategic position in the northern part of Karnataka, India, nestled within the Deccan Plateau at an elevation of approximately 600 meters above sea level. This historic city, renowned for its architectural marvels like the Gol Gumbaz, lies in a semi-arid region characterized by flat to gently undulating terrain, with the Krishna River flowing to its south and the Bhima River to the north, though neither directly borders the urban core, limiting natural air cleansing effects. Situated in the heart of an agricultural belt dominated by sugarcane, cotton, and pulses, Bijapur's air quality is intrinsically linked to its rural surroundings, where farming activities contribute significantly to particulate matter. The urban–rural gradient sees a dense, compact city center giving way to sprawling peri-urban zones, where construction and informal waste burning are prevalent. Its location in South Asia's interior, away from major coastal influences, exacerbates pollution retention, as stagnant air masses often trap emissions from local sources like vehicle exhaust, road dust from unpaved lanes, and emissions from cement and lime kilns scattered in the industrial fringes. The surrounding landscape, largely devoid of dense forests, offers little vegetative filtration, while the dry, rocky soil fuels dust storms during windy periods, compounding air quality challenges in this culturally rich but pollution-vulnerable city.

In Bijapur's tropical wet-and-dry climate, air quality follows a distinct seasonal rhythm, with pollution peaking dramatically from November to February, the winter months when cold, stable conditions prevail. During this period, temperature inversions trap pollutants close to the ground, while low wind speeds and frequent fog, especially in December and January, exacerbate the accumulation of particulate matter from sources like agricultural burning post-harvest and increased biomass burning for warmth. Sensitive groups, such as children, the elderly, and those with respiratory conditions, should avoid prolonged outdoor activities in these months, particularly during early mornings when pollution concentrations are highest. The monsoon season, from June to September, brings relief as heavy rains wash away pollutants, and strong winds disperse emissions, making this the best time for outdoor pursuits despite high humidity. Spring (March to May) sees a gradual deterioration as temperatures soar, leading to extreme heat that intensifies ozone formation and resuspends road dust, while pre-monsoon winds in May can temporarily clear the air. Autumn (October) marks the transition back to hazardous conditions, as reduced rainfall and cooling temperatures set the stage for the winter pollution spike, underscoring the need for year-round vigilance in this air quality-challenged city.