Pattikād, situated in the Thrissur district of Kerala, India, occupies a distinctive position within the broader South Asian context, nestled approximately 10.5276°N, 76.2144°E. This urban centre lies in the coastal midlands of Kerala, characterised by undulating terrain with an average elevation of around 50-100 metres above sea level, which subtly influences local air circulation patterns. The city is positioned inland from the Arabian Sea, roughly 40 kilometres to the west, yet benefits from the moderating maritime influence that typically helps disperse pollutants, though this effect diminishes with distance. Surrounding Pattikād is a mosaic of agricultural zones, predominantly paddy fields and coconut groves, interspersed with rural settlements, creating an urban–rural gradient where urban emissions blend with agricultural activities like biomass burning. The region is part of Kerala's central belt, with proximity to industrial clusters in nearby cities such as Thrissur and Kochi, which can contribute to transported pollution under specific wind conditions. The terrain, featuring gentle slopes and river valleys, including the nearby Karuvannur River, can occasionally trap pollutants during calm weather, particularly in low-lying areas. This geographic setting, combined with a dense population of over 315,000, results in air quality shaped by local vehicular emissions, construction dust, and domestic fuel use, exacerbated by the humid tropical climate that can enhance particulate matter suspension.

In Pattikād, the seasonal air quality narrative is intricately tied to Kerala's tropical monsoon climate, with distinct variations across the year. During the pre-monsoon months from March to May, rising temperatures and reduced rainfall lead to increased dust resuspension and higher pollutant concentrations, making this period less favourable for outdoor activities, especially for sensitive groups like asthmatics. The southwest monsoon, from June to September, brings heavy rainfall that effectively scrubs the air, resulting in the cleanest conditions; this is the optimal time for outdoor pursuits, with reduced health risks. Post-monsoon, from October to November, sees a gradual return of pollutants as rains subside and agricultural burning may occur, though moderate winds help mitigate buildup. Winter months, December to February, are characterised by cooler temperatures and occasional fog, which can trap pollutants near the ground, particularly during morning hours, posing challenges for respiratory health. Throughout the year, wind patterns, influenced by the Arabian Sea, play a crucial role, with sea breezes aiding dispersion but land breezes at night potentially concentrating emissions. Sensitive individuals should monitor local air quality reports, avoid strenuous activities during peak pollution periods, and consider indoor air purifiers during drier months to manage exposure effectively.