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Kādiyāmpatti, a small town in Tamil Nadu, India, is situated at coordinates 11.8720°N, 78.0961°E, placing it within the fertile Kaveri Delta region. The terrain is predominantly flat, characteristic of alluvial plains formed by the Kaveri River and its tributaries. This relatively low elevation contributes to limited natural air dispersion. The town’s population of approximately 12,625 suggests a predominantly rural character, though increasing connectivity is likely driving some urbanisation. Kādiyāmpatti is surrounded by intensive agricultural land, primarily paddy fields, with sugarcane and other crops also prevalent. This agricultural activity, while vital to the local economy, introduces potential sources of air pollution through the use of fertilizers, pesticides, and biomass burning for land preparation. The proximity to larger urban centres like Tiruchirappalli (approx. 35km) means Kādiyāmpatti is increasingly influenced by regional pollution transport. The urban-rural gradient is noticeable, with air quality generally worsening closer to road networks and any small-scale industrial activity. The lack of significant natural barriers like hills or forests limits the town’s ability to naturally filter pollutants. Understanding this geographic context is crucial for assessing and mitigating air quality challenges.

Kādiyāmpatti experiences a tropical climate with distinct wet and dry seasons, heavily influencing its air quality. The dry season, roughly from January to April, sees increased dust and particulate matter due to drier conditions and agricultural practices like harvesting. Wind patterns during this period are generally light, leading to pollutant accumulation. May-June bring pre-monsoon conditions with rising temperatures and potential for localised dust storms, exacerbating respiratory issues. The southwest monsoon arrives in July, offering temporary relief through rainfall that washes away pollutants, but also increasing humidity which can trap pollutants near the ground. August-September often experience continued rainfall, improving air quality, but stagnant conditions can develop between rainfall events. The post-monsoon season (October-December) is characterised by cooler temperatures and relatively clear skies, generally representing the best air quality period. However, this is also when agricultural residue burning is common, creating localised spikes in pollution. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during the dry season and periods of agricultural burning. Monitoring wind direction during burning events is crucial for avoiding exposure.