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Mundakkal, nestled in the Kollam district of Kerala, India, occupies a geographically significant position within the state's southern region. Located at approximately 11.3244° N latitude and 75.9928° E longitude, the town’s terrain is characterized by undulating hills and valleys, typical of Kerala’s coastal plains transitioning into the Western Ghats. The elevation varies, generally ranging from 15 to 45 meters above sea level, influencing local wind patterns and temperature distribution. Mundakkal benefits from proximity to the Ashtamudi Lake, a vast and ecologically important brackish water lagoon, and the Kallada River, both of which contribute to the region’s humidity and moderate temperatures. The surrounding landscape is a mosaic of rubber plantations, coconut groves, paddy fields, and interspersed villages, representing a strong agricultural character. This rural-agricultural gradient gradually merges with the urban fabric of Kollam city, located approximately 15 kilometers to the north, creating a mixed urban-rural environment. While Mundakkal itself is a relatively small town, its location within the Kollam metropolitan area means it is indirectly influenced by industrial activity and transportation corridors associated with the larger city. The prevailing southwest monsoon winds, coupled with the hilly terrain, can trap pollutants in localized areas, particularly during periods of reduced wind speed. The town’s geography, therefore, presents a complex interplay of natural factors that shape its air quality profile, balancing the benefits of a humid, tropical climate with potential challenges related to localized pollution accumulation.

Mundakkal’s tropical climate dictates a distinct wet and dry seasonal pattern, profoundly impacting its air quality. The southwest monsoon season, spanning roughly June to September, brings torrential rainfall and strong winds, effectively flushing out accumulated pollutants and generally resulting in improved air quality. However, during the initial weeks of the monsoon, dust storms associated with shifting winds can temporarily degrade air quality. The dry season, from October to May, presents a different scenario. Reduced rainfall and lower humidity lead to a build-up of particulate matter, particularly during the cooler months of December and January. Temperature inversions, common during these months, trap pollutants close to the ground, exacerbating the issue. Fog, frequently occurring in the mornings, further restricts atmospheric mixing and contributes to stagnant air conditions. Agricultural burning, a common practice in surrounding areas during the post-monsoon period to clear fields for the next planting season, significantly contributes to particulate pollution. The months of February and March often experience elevated levels of smoke and dust. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during these periods, limiting outdoor exertion and monitoring for any adverse health effects. During the monsoon months, while generally cleaner, individuals should remain vigilant for potential dust events and take necessary precautions. The transition periods between seasons can also be challenging, with fluctuating wind patterns and variable pollutant concentrations.