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Beypore, a coastal town in Kerala, India, rests at coordinates 11.1800°N, 75.8100°E, and is a significant port and fishing hub within the Kozhikode district. Its geography is defined by its location on the Malabar Coast, bordering the Arabian Sea. The terrain is relatively flat, typical of the coastal plains of Kerala, with a gentle slope inland. This proximity to the sea significantly influences local weather patterns and air quality. Beypore’s urban character is a blend of traditional fishing village and growing commercial centre, with a population of 66,883. Surrounding the town are lush coconut groves and paddy fields, representing a strong agricultural presence. While not heavily industrialized itself, Beypore benefits from, and is impacted by, the industrial activity concentrated further north towards Kozhikode city. The urban-rural gradient is noticeable, transitioning from denser settlements near the port to more dispersed agricultural land. Sea breezes offer some dispersion of pollutants, but can also trap them during calm conditions. The Chaliyar River, flowing into the sea nearby, contributes to humidity and can influence local microclimates, potentially affecting pollutant deposition. The low elevation makes the area susceptible to humidity and stagnant air, impacting air quality.

Beypore experiences a tropical climate with distinct wet and dry seasons, heavily influencing air quality. The southwest monsoon, arriving in June and lasting until September, brings heavy rainfall which initially *improves* air quality by washing away particulate matter. However, increased humidity can also foster mold growth, impacting respiratory health. October to February represents the drier season, with calmer winds and cooler temperatures. This period often sees a build-up of pollutants, particularly from localized sources like vehicle emissions and traditional cooking methods using biomass. January and February are generally the least favourable months for outdoor activity for those with respiratory sensitivities. March to May is the hottest and most humid period before the monsoon, often experiencing stagnant air and increased dust levels, leading to poorer air quality. Temperature inversions, common during these calm periods, trap pollutants near the ground. The post-monsoon season (September-November) sees a gradual return of drier conditions and a potential increase in localized pollution. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit strenuous outdoor activity during the drier months and monitor their health closely.