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Bīkaner, situated in the arid expanses of Rajasthan's Thar Desert in northwestern India, occupies a distinctive geographic position that profoundly shapes its air quality challenges. Located at approximately 230 meters above sea level on flat to gently undulating terrain, the city lies within the Great Indian Desert, characterized by sparse vegetation, sandy soils, and minimal natural water bodies—the nearest significant river, the Luni, flows over 100 kilometers to the south. This desert environment creates a dust-prone landscape where wind-blown particulate matter frequently becomes airborne. Bīkaner's urban character blends historic fort architecture with modern expansion, positioned along a key transportation corridor connecting Delhi to Pakistan, which contributes to vehicular emissions. The region transitions from urban centers to rural agricultural zones where crop residue burning occurs, though less intensively than in Punjab. Proximity to industrial belts is limited compared to India's eastern cities, but local brick kilns, small-scale industries, and diesel generators add to pollution. The city's isolation from moderating maritime influences results in extreme temperature variations that trap pollutants, while the lack of rainfall for much of the year allows particulate accumulation. Bīkaner's air quality is thus primarily influenced by natural dust, localized urban emissions, and regional agricultural practices, exacerbated by its desert basin location that inhibits pollutant dispersion.

Bīkaner's air quality follows a distinct seasonal rhythm driven by the harsh desert climate and regional meteorological patterns. During winter (December to February), cold temperatures and frequent temperature inversions trap pollutants close to the ground, leading to peak pollution episodes; calm winds and morning fog further reduce dispersion, making these months particularly hazardous for outdoor activities, especially for sensitive groups like children, the elderly, and those with respiratory conditions. Spring (March to May) sees rising temperatures and increased dust storms from the Thar Desert, elevating particulate levels, though stronger daytime winds can provide temporary relief. The summer monsoon (June to September) brings the cleanest air, as rainfall washes away pollutants and winds disperse dust, offering the best conditions for outdoor exertion. Post-monsoon (October to November) marks a transition, with decreasing humidity and the onset of agricultural burning in surrounding regions, gradually worsening air quality ahead of winter. Sensitive individuals should avoid prolonged outdoor exposure during winter and spring, opt for indoor activities during peak pollution hours, and monitor local air quality advisories. The seasonal variation underscores the importance of timing outdoor visits—favoring the monsoon months—and adopting protective measures like masks during high-dust periods.