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Āndipālaiyam, nestled in the Tiruppur district of Tamil Nadu, India, occupies a geographically significant position within the Kaveri Delta region. Located at approximately 11.0920° N latitude and 77.3150° E longitude, the town’s terrain is predominantly flat, characteristic of the fertile delta lands formed by the Kaveri River and its tributaries. The surrounding landscape is a mosaic of agricultural fields, primarily cultivating cotton, paddy, and sugarcane – key contributors to the region’s economy. Āndipālaiyam’s proximity to Tiruppur, a major textile hub, is a crucial factor influencing its environmental profile. This industrial belt, known for its knitwear and garment manufacturing, introduces localized pollution sources. The urban–rural gradient transitions rapidly, with Āndipālaiyam exhibiting a semi-urban character, blending agricultural practices with increasing residential and commercial development. The elevation is relatively low, averaging around 100 meters above sea level, which can exacerbate the trapping of pollutants, particularly during periods of stagnant air. While not directly adjacent to a major river, the town benefits from the region’s groundwater resources, influencing local microclimates. The flat topography and surrounding agricultural lands contribute to a relatively stable atmospheric boundary layer, potentially hindering pollutant dispersion. The prevailing winds, often influenced by the Bay of Bengal, play a role in transporting pollutants from the industrial zones of Tiruppur and surrounding areas, impacting Āndipālaiyam’s air quality.

Āndipālaiyam’s air quality experiences a distinct seasonal cycle dictated by the region’s tropical climate and monsoon patterns. The dry season, typically spanning from March to May, often witnesses a noticeable increase in particulate matter. This is largely attributed to increased agricultural burning of crop residue after harvest, combined with stagnant air conditions and temperature inversions that trap pollutants close to the ground. Dust from construction activities and vehicular emissions further contribute to the problem. The monsoon season, arriving around June and lasting through September, brings relief as rainfall washes away pollutants and increased wind speeds facilitate dispersion. However, the onset of the monsoon can initially be accompanied by elevated humidity and fog, which can temporarily reduce visibility and trap pollutants. October and November represent a transitional period, with decreasing rainfall and gradually increasing temperatures, potentially leading to a resurgence of particulate matter. December and January are generally cooler months, with occasional fog, which can again lead to localized pollution trapping. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season and periods of fog, minimizing outdoor exertion and utilizing air purifiers when available. Agricultural workers are particularly vulnerable and should prioritize protective measures like masks during burning activities. Public awareness campaigns promoting cleaner agricultural practices and responsible waste management are crucial for mitigating seasonal air quality fluctuations.