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Nāttarampalli, a small town in Tamil Nadu, India, sits at coordinates 12.5920°N, 78.5116°E, within the Dharmapuri district. The terrain is generally flat to gently undulating, characteristic of the southern Deccan Plateau. The town’s elevation is relatively low, contributing to limited atmospheric dispersion of pollutants. Nāttarampalli is not directly adjacent to major bodies of water, though smaller streams and irrigation channels support the surrounding agricultural land. The region is predominantly rural, with agriculture – particularly mango cultivation and other horticultural crops – forming the economic backbone. However, increasing industrial activity in nearby areas, particularly related to granite and stone processing, is becoming a factor. The urban-rural gradient is quite sharp; Nāttarampalli itself is a relatively small urban centre surrounded by extensive agricultural fields and sparsely populated villages. This proximity to agricultural practices introduces potential sources of particulate matter from dust and biomass burning. The town’s location, shielded by the Western Ghats to the west, can limit the flushing effect of strong winds, potentially trapping pollutants during periods of calm weather. The lack of significant natural ventilation corridors exacerbates this effect, making Nāttarampalli susceptible to localised air quality issues. The surrounding landscape, dominated by dry deciduous forests, also contributes to seasonal dust and pollen levels.

Nāttarampalli experiences a tropical climate with distinct wet and dry seasons, heavily influencing air quality. The dry season, from November to May, typically sees the poorest air quality. Lower humidity and increased wind speeds during the initial months of the dry season (November-January) can stir up dust from agricultural lands and construction activities. As temperatures rise in February-May, stable atmospheric conditions and temperature inversions become more frequent, trapping pollutants near the ground. The southwest monsoon, arriving in June, brings significant rainfall, effectively washing away particulate matter and improving air quality dramatically. However, increased humidity can also promote the growth of mold and allergens. Post-monsoon (September-October) sees a gradual return to drier conditions, with a moderate increase in pollutants. October often experiences stagnant air, leading to localised pollution build-up. For those with respiratory sensitivities, avoiding outdoor activity during the peak dry season (February-May) is advisable. The monsoon months (June-September) offer the best air quality for outdoor pursuits. During periods of calm, particularly in the dry season, individuals with asthma or other respiratory conditions should limit strenuous activity and consider using respiratory protection. Monitoring local weather patterns is crucial for anticipating pollution episodes.