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Bellary, situated in the heart of Karnataka's mineral-rich Bellary district at coordinates 15.1000°N, 76.9167°E, occupies a strategic position in South India's Deccan Plateau. The city lies approximately 300 meters above sea level on undulating terrain characterized by rocky outcrops and scrubland, with the Tungabhadra River flowing about 30 kilometers to the south. This semi-arid landscape, part of the larger Rayalaseema region, creates a distinct urban-rural gradient where Bellary serves as the commercial and administrative hub amidst surrounding agricultural zones cultivating cotton, groundnuts, and pulses. The city's geography profoundly influences air quality through multiple mechanisms. Its location within India's iron ore mining belt—with extensive mining operations in the nearby Sandur and Hospet regions—means industrial dust and particulate matter from ore processing and transportation significantly contribute to local pollution. The dry, rocky terrain lacks substantial vegetation to naturally filter airborne pollutants, while the absence of major water bodies nearby reduces humidity that might otherwise help settle dust. Urban expansion has created a heat island effect that traps pollutants, exacerbated by vehicular emissions from the city's role as a regional transport node connecting Karnataka to Andhra Pradesh and Telangana. The surrounding agricultural burning during specific seasons further compounds particulate pollution, making Bellary's air quality a complex interplay of industrial, urban, and rural influences.

Bellary's air quality follows a distinct seasonal pattern shaped by its semi-arid climate and regional activities. During the hot summer months from March to May, temperatures frequently exceed 40°C, creating thermal inversions that trap pollutants near the ground. This period sees elevated particulate levels from increased construction activity, road dust resuspension by dry winds, and occasional agricultural residue burning after harvests. Sensitive groups should limit outdoor exertion during afternoon hours when pollution concentrations peak. The monsoon season from June to September brings relief as southwest winds and rainfall effectively wash away airborne pollutants, resulting in the year's cleanest air—ideal for outdoor activities. However, high humidity can occasionally combine with industrial emissions to form secondary pollutants. Post-monsoon months of October and November experience a gradual deterioration as temperatures drop and wind patterns shift, with increased pollution from Diwali fireworks and resumed mining operations. Winter from December to February presents the most challenging period for air quality, as cool temperatures and frequent fog create persistent inversion layers that accumulate pollutants from industrial, vehicular, and domestic heating sources. Morning hours are particularly problematic, with sensitive individuals advised to avoid outdoor exercise until afternoon thermal mixing improves dispersion. Throughout the year, wind direction plays a crucial role, with northeasterly winds sometimes transporting additional industrial emissions from neighboring districts.