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Mayyanād, nestled in the Kasaragod district of Kerala, India, occupies a geographically significant position along the western coast. Located at approximately 8.8391° N latitude and 76.6469° E longitude, the town’s terrain is characterized by a gentle slope towards the Arabian Sea, influencing local wind patterns and coastal breezes. The surrounding landscape is a mosaic of lush agricultural fields, primarily rice paddies and coconut groves, interspersed with small-scale plantations. This agricultural zone contributes to the region’s rural character, with a gradual urban–rural gradient extending outwards from Mayyanād. The town itself exhibits a relatively low elevation, rarely exceeding 30 meters above sea level, which can exacerbate the trapping of pollutants under certain meteorological conditions. Its proximity to the Arabian Sea provides a moderating influence on temperature, but also introduces the potential for marine-borne aerosols and salt spray impacting air quality. While Mayyanād isn't directly adjacent to major industrial belts, it lies within a region experiencing increasing development, with nearby towns exhibiting some light industrial activity, including cashew processing and small-scale manufacturing. The prevailing winds, generally southwesterly during the monsoon and northwesterly during the dry season, play a crucial role in dispersing or concentrating pollutants, impacting air quality across the town and its immediate surroundings. The coastal plain's flat topography limits vertical mixing, potentially leading to ground-level pollutant accumulation.

Mayyanād’s tropical climate dictates a distinct wet and dry season cycle, profoundly influencing its air quality profile. The southwest monsoon, typically spanning June to September, brings abundant rainfall, effectively scrubbing the atmosphere and significantly reducing particulate matter. This period generally offers the best air quality, with frequent rain showers dispersing pollutants and promoting natural cleansing. However, heavy rainfall can also lead to increased humidity, potentially exacerbating respiratory issues for sensitive individuals. The subsequent dry season, from October to May, presents a contrasting scenario. Reduced rainfall and lower humidity contribute to a build-up of pollutants, particularly during the cooler months of December and January. Temperature inversions, common during these months, trap cooler air near the ground, preventing vertical mixing and concentrating pollutants. Fog, frequently occurring in the mornings, further restricts dispersion. Agricultural burning, a common practice in surrounding areas during the post-monsoon period to clear fields for the next planting season, introduces significant levels of smoke and particulate matter. February and March often see a gradual improvement as winds increase and temperatures rise. Sensitive groups, including children, the elderly, and individuals with pre-existing respiratory conditions, should exercise caution during the dry season, particularly during periods of fog or agricultural burning. Outdoor activities are generally best enjoyed during the monsoon months, while limiting exposure during the cooler, drier months is advisable.