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Edayikunnam, nestled within the verdant landscape of Kerala, India, occupies a unique geographic position at coordinates 10.1009°N, 76.3713°E. This small city, home to approximately 28,607 residents, is situated in the midlands of the state, characterized by rolling hills and a relatively gentle terrain compared to the Western Ghats further east. The surrounding landscape is predominantly agricultural, dominated by rubber plantations, spice farms (particularly pepper and cardamom), and coconut groves. This intensive agricultural activity, while economically vital, contributes to localised air quality concerns through the use of fertilizers and potential biomass burning. Edayikunnam isn’t directly adjacent to major industrial belts, but its proximity to larger towns like Kottayam means it experiences some degree of regional pollution transport. The urban-rural gradient is quite sharp; the city itself is relatively compact, quickly transitioning into rural farmland. The lack of significant elevation changes generally promotes air mixing, but localised valleys can experience stagnant air conditions. The humid tropical climate and frequent rainfall play a crucial role in naturally cleansing the atmosphere, though this effect is lessened during drier periods. The city’s position doesn’t benefit from strong coastal breezes, limiting marine influences on air dispersal.

Edayikunnam’s air quality follows a distinct seasonal pattern dictated by the monsoon and inter-monsoon periods. The Southwest Monsoon, typically arriving in June and lasting until September, brings heavy rainfall that effectively washes pollutants from the atmosphere, resulting in the cleanest air of the year. Outdoor activity is generally favourable during these months, though humidity remains high. October to December marks the post-monsoon season, with decreasing rainfall and gradually increasing temperatures. This period often sees a slight increase in particulate matter due to drier conditions and agricultural practices like harvesting and preparing fields for the next season. January to March are the driest months, and this is when air quality tends to be poorest. Temperature inversions, common during these cooler months, trap pollutants near the ground. Biomass burning for land preparation can exacerbate the issue. April and May, the pre-monsoon months, are hot and humid, with increasing dust levels and a build-up of pollutants before the monsoon’s arrival. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit strenuous outdoor activity during January-March. Monitoring wind patterns is crucial; calm conditions worsen pollution concentration.