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Tādikombu, a small town in the Tiruchirappalli district of Tamil Nadu, India, occupies a relatively flat terrain at an elevation of approximately 85 meters above sea level. Its coordinates (10.4390, 77.9546) place it within the fertile Kaveri Delta region, a predominantly agricultural landscape. The town is situated inland, roughly 20 kilometers from the Kaveri River, and benefits from the alluvial soils deposited by the river system, supporting intensive farming. Surrounding Tādikombu are extensive paddy fields, coconut groves, and plantations of sugarcane and other crops. While not a major industrial hub itself, the town’s proximity to larger industrial areas around Tiruchirappalli and Karur contributes to regional air pollution transport. The urban-rural gradient is pronounced; Tādikombu retains a largely rural character, but is increasingly influenced by the economic activity and associated emissions from nearby cities. The lack of significant topographical features – hills or valleys – means that pollutant dispersion relies heavily on meteorological conditions. Dust from agricultural activities, particularly during harvest seasons, is a significant local contributor to particulate matter. The town’s location within a tropical climate zone also influences air quality, with high temperatures and humidity impacting pollutant chemistry and dispersion.

Tādikombu experiences a tropical climate, with air quality fluctuating significantly between the wet and dry seasons. The dry season, from February to May, sees a peak in particulate matter pollution. High temperatures and low humidity promote dust resuspension from agricultural lands and unpaved roads. Stagnant air masses and temperature inversions, common during these months, trap pollutants near the ground. April and May are typically the worst months for outdoor activity, particularly for those with respiratory conditions. The southwest monsoon arrives in June, bringing relief from the heat and a significant improvement in air quality as rainfall washes away pollutants. However, increased humidity can also foster fungal growth, impacting allergy sufferers. The northeast monsoon, from October to December, brings further rainfall and generally good air quality, though localised flooding can sometimes lead to stagnant water and increased mosquito populations. January and February offer the most favourable conditions for outdoor activities. Sensitive groups – children, the elderly, and those with pre-existing respiratory or cardiovascular conditions – should limit exposure during the dry season and monitor local conditions closely.