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Kadikkād, a coastal town in Kerala, India, rests at coordinates 10.6667°N, 75.9667°E, and supports a population of approximately 16,815. Its geography is defined by the Arabian Sea’s immediate influence, lying within the broader coastal plains of the Malabar region. The terrain is relatively flat, typical of Kerala’s coastal areas, with a gentle slope inland. This proximity to the sea moderates temperatures but also contributes to high humidity levels throughout much of the year. Kadikkād isn’t a major industrial hub, but benefits from, and is affected by, the industrial activity concentrated further north around Kozhikode and the broader Ernakulam region. Surrounding Kadikkād are lush coconut groves, paddy fields, and a network of backwaters – a characteristic feature of Kerala’s landscape. The urban-rural gradient is quite sharp; the town itself is densely populated, transitioning quickly to agricultural land and rural settlements. This close proximity to agricultural practices introduces potential sources of particulate matter from biomass burning and fertilizer use. The coastal location means sea breezes play a crucial role in dispersing pollutants, but can also trap them during periods of calm weather. The relatively low elevation makes the area susceptible to humidity-driven pollutant formation and limited atmospheric mixing.

Kadikkād’s air quality follows a distinct wet and dry season pattern dictated by the Southwest Monsoon. The monsoon, typically arriving in June and lasting until September, brings heavy rainfall which effectively washes away pollutants, resulting in the cleanest air of the year. However, increased humidity during this period can also foster mold growth, impacting respiratory health. October to February constitutes the drier season, with lower rainfall and calmer winds. This leads to a build-up of pollutants, particularly from local traffic, construction, and agricultural activities. January and February often experience the poorest air quality. Post-monsoon, November and December see a gradual increase in particulate matter. During the transition months of March-May, temperatures rise, exacerbating ground-level ozone formation. Temperature inversions, where a layer of warm air traps cooler air below, are common during these calmer periods, further concentrating pollutants. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor exertion during the drier months, especially in the late afternoons. Monitoring local weather patterns and avoiding peak traffic hours are advisable. The monsoon months offer the most favourable conditions for outdoor activities.