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Kowdalli, nestled in the Mandya district of Karnataka, India, occupies a geographically significant position within the Deccan Plateau's southern fringe. Located at approximately 12.0670° N latitude and 77.4438° E longitude, the village sits at a modest elevation, contributing to a relatively mild climate. Its surrounding landscape is predominantly agricultural, characterized by fertile plains irrigated by the Cauvery River, a vital lifeline for the region's rice and sugarcane cultivation. This proximity to intensive agricultural practices introduces localized sources of air pollution, particularly from crop residue burning during post-harvest seasons. Kowdalli’s position within the broader Bangalore metropolitan area’s influence zone means it experiences a gradual urban–rural gradient; while retaining its village character, it’s increasingly exposed to the indirect impacts of Bangalore’s industrial and vehicular emissions. The terrain is gently undulating, which can sometimes trap pollutants, especially during periods of low wind speed. The Cauvery River itself, while a source of water and irrigation, can also contribute to localized humidity, influencing the dispersion of airborne particles. The absence of major industrial zones directly within Kowdalli mitigates some pollution risks, but the regional agricultural activity and the broader metropolitan influence create a complex interplay of factors affecting air quality. The village’s relatively small population (11,131) means that local emissions from residential sources are less impactful compared to regional factors.

Kowdalli’s tropical climate dictates a distinct wet and dry season pattern, significantly influencing its air quality. The dry season, typically spanning from November to May, often witnesses a noticeable increase in particulate matter. This is largely attributable to agricultural practices; farmers frequently resort to crop residue burning after the harvest of rice and sugarcane, releasing substantial amounts of smoke and pollutants into the atmosphere. The lack of consistent rainfall during this period allows these particles to linger, particularly when wind speeds are low, leading to stagnant air conditions. Temperature inversions, common during the cooler months (December-February), further exacerbate the problem by trapping pollutants near the ground. The monsoon season, from June to October, brings relief through frequent rainfall, effectively washing away particulate matter and diluting gaseous pollutants. However, the onset of the monsoon can also be accompanied by increased humidity, which can affect the respiratory system. Fog, particularly in the early morning hours during the cooler months, can also trap pollutants, reducing visibility and increasing exposure. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, especially during periods of crop residue burning. Outdoor activities are generally more favourable during the monsoon months, although humidity levels should be considered. The post-monsoon period (October-November) can also see a temporary rise in pollution as agricultural activity ramps up before the dry season fully sets in, requiring vigilance and awareness of potential air quality impacts.