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Khānāpur, situated in the Belagavi district of Karnataka, India, occupies a strategic position in the Western Ghats region at coordinates 15.6394°N, 74.5083°E. Nestled within the undulating terrain of the Deccan Plateau, the city lies at an elevation of approximately 600-700 meters above sea level, which significantly influences its local microclimate and air quality patterns. The urban area is characterized by a mix of traditional settlement patterns and modern development, creating a distinct urban-rural gradient where the core transitions into agricultural hinterlands. Khānāpur's location places it near the Malaprabha River basin, with water bodies and reservoirs dotting the surrounding landscape, providing some natural ventilation but also contributing to humidity that can trap pollutants. The region is part of Karnataka's agricultural belt, with extensive cultivation of sugarcane, maize, and pulses, leading to seasonal agricultural burning that impacts air quality. Proximity to industrial zones in Belagavi and Hubballi-Dharwad introduces transported pollution, while local sources include vehicular emissions from National Highway 4A and small-scale industries. The city's position in the rain shadow of the Western Ghats means it receives less rainfall than coastal areas, reducing natural cleansing of the atmosphere. The terrain, with its gentle slopes and valleys, can create localized air stagnation, particularly during cooler months when temperature inversions form, trapping pollutants near the ground and exacerbating urban air quality issues.

Khānāpur's air quality follows a distinct seasonal rhythm shaped by its tropical savanna climate and regional meteorological patterns. During winter (December-February), cool temperatures and frequent temperature inversions trap pollutants close to the ground, creating the year's worst air quality conditions. Morning fog combines with smoke from agricultural residue burning and domestic heating, making these months particularly challenging for respiratory health. Sensitive groups should limit outdoor activities during early mornings and late evenings when pollution concentrations peak. Spring (March-May) brings rising temperatures and increasing wind speeds that help disperse pollutants, though occasional dust storms from dry agricultural fields can cause temporary spikes. The pre-monsoon period in late May often sees improved ventilation. Summer monsoon (June-September) dramatically cleanses the atmosphere with heavy rainfall washing away particulate matter, resulting in the cleanest air of the year. However, high humidity can increase mold spores and biological pollutants indoors. Post-monsoon (October-November) marks a transition period where decreasing rainfall and agricultural burning activities begin to degrade air quality again. The Diwali festival in October or November typically causes short-term pollution spikes from fireworks. For optimal outdoor activity, the monsoon months offer the best conditions, while winter requires careful timing of activities to avoid peak pollution hours and consideration of indoor air filtration for vulnerable populations.