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Sante Bennūr, nestled in the Karnataka state of India, occupies a geographically significant position within the Tumkur district. Located at approximately 14.1697° N latitude and 76.0033° E longitude, the town’s terrain is characterized by gently undulating plains, typical of the Deccan Plateau. The surrounding landscape is predominantly agricultural, with extensive fields of rice, sugarcane, and pulses dominating the rural areas. This proximity to intensive agricultural practices contributes to localized air quality concerns, particularly from seasonal burning of crop residue. The town sits at a relatively low elevation, around 1150 feet above sea level, which can exacerbate the trapping of pollutants, especially during periods of atmospheric stability. While not directly adjacent to a major river, Sante Bennūr benefits from the presence of smaller water bodies and irrigation canals, which can offer some localized humidity and influence microclimates. The urban–rural gradient is relatively sharp; the town transitions quickly from built-up areas to agricultural land, meaning that agricultural emissions can readily impact the town’s air quality. The regional position, situated between larger industrial hubs like Bangalore and Tumkur, means it is less directly impacted by large-scale industrial pollution, but still susceptible to transported pollutants. The prevailing wind patterns, generally from the southwest during the monsoon and shifting to the northeast during the dry season, play a crucial role in dispersing or concentrating pollutants within the town and its immediate surroundings. The flat terrain limits natural ventilation, potentially hindering pollutant dispersion.

Sante Bennūr’s air quality follows a distinct seasonal pattern dictated by the region’s tropical climate. The monsoon season, typically from June to September, brings relief from accumulated pollutants due to increased rainfall and stronger winds that effectively flush out particulate matter. Humidity levels are high, which can slightly reduce the impact of certain pollutants on respiratory health. However, the monsoon can also introduce fungal spores and allergens, impacting those with sensitivities. The post-monsoon period (October-November) often sees a gradual increase in pollution as agricultural burning resumes, releasing smoke and particulate matter into the atmosphere. This is a particularly vulnerable time for air quality. The dry season (December-May) presents the most significant challenges. With reduced rainfall and calmer winds, temperature inversions frequently occur, trapping pollutants close to the ground. Fog, common during the cooler months (December-February), further exacerbates this issue by reducing visibility and hindering dispersion. March and April, with rising temperatures and minimal rainfall, often experience peak pollution levels. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during these months, particularly during early morning and late afternoon when pollutants tend to concentrate. Maintaining indoor air quality through ventilation and air purifiers is also advisable. The agricultural cycle significantly influences the air quality, with periods of burning directly correlating with increased particulate matter. The transition periods between seasons are crucial, requiring heightened awareness and precautionary measures.