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Jadayāmpālaiyam, a small town in Tamil Nadu, India, sits at coordinates 11.2930°N, 76.9495°E, nestled within the broader Kongu Nadu region. The terrain is largely flat, characteristic of the fertile plains of the Cauvery River basin, though gentle undulations are present. The town’s elevation is relatively low, contributing to limited atmospheric dispersion of pollutants. It’s situated approximately 20km from the city of Erode, a significant textile and agricultural hub, and benefits from proximity to the Noyyal River, though water quality in the river is a concern. The surrounding landscape is dominated by agricultural fields – primarily coconut, turmeric, and vegetable farms – interspersed with pockets of rural settlements. This agricultural intensity contributes to seasonal biomass burning, a key local pollution source. The urban-rural gradient is pronounced; Jadayāmpālaiyam itself retains a small-town character, but is increasingly influenced by the industrial and commercial activity emanating from Erode. This proximity, coupled with the flat topography, means pollutants generated in Erode can readily impact Jadayāmpālaiyam’s air quality. Dust from unpaved roads and construction activities within the town itself also contribute to particulate matter levels. The lack of significant natural barriers to wind flow can both help and hinder dispersion, depending on prevailing meteorological conditions.

Jadayāmpālaiyam experiences a tropical climate with distinct wet and dry seasons, heavily influencing air quality. The dry season, from February to May, sees consistently higher particulate matter concentrations due to increased dust from agricultural activities, road traffic, and construction. Hot, dry winds exacerbate these conditions, reducing atmospheric mixing. April and May are typically the least favourable months for outdoor activity, particularly for those with respiratory sensitivities. The southwest monsoon arrives in June, bringing relief from the heat and temporarily improving air quality through rainfall-induced dust suppression. However, increased humidity can also foster fungal growth, impacting those with allergies. Post-monsoon (September-November) sees a moderate improvement, but residual moisture and calmer winds can lead to localised temperature inversions, trapping pollutants near the ground. The northeast monsoon, from October to December, brings heavier rainfall, offering the best air quality of the year, though localised flooding can disrupt transportation and potentially release pollutants from stagnant water. During the cooler months (December-February), fog can form, trapping pollutants and reducing visibility. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit strenuous outdoor activity during the dry season and periods of fog.