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Tiruppūr, situated in the western part of Tamil Nadu at coordinates 11.1085°N, 77.3411°E, occupies a strategic position in the Kongu Nadu region of South India, approximately 450 kilometers southwest of Chennai and 50 kilometers east of Coimbatore. The city lies on the relatively flat plains of the Noyyal River basin at an elevation of about 295 meters above sea level, with the Western Ghats rising dramatically to the west and the drier Deccan Plateau extending to the north and east. This geographic setting creates a transitional zone between the humid coastal influences and the semi-arid interior, significantly impacting local air circulation patterns. Tiruppūr has evolved from a modest market town into the global 'Knitwear Capital of India,' with its urban fabric dominated by textile manufacturing clusters, dyeing units, and garment export hubs that form a dense industrial belt along the city's periphery. The surrounding landscape features a mix of agricultural fields—primarily cotton, turmeric, and coconut plantations—that gradually give way to more rural settlements, creating a distinct urban-rural gradient. Proximity to the Noyyal River, while historically significant for irrigation and textile processing, has led to water pollution concerns that indirectly affect air quality through industrial runoff and waste management issues. The city's location in this valley-like basin, flanked by the Western Ghats, can trap pollutants during periods of calm winds, particularly when temperature inversions occur, preventing the dispersion of emissions from thousands of small-scale textile units, diesel generators, and increasing vehicular traffic.

Tiruppūr's air quality follows a distinct seasonal rhythm shaped by its tropical savanna climate, with pollution patterns closely tied to monsoon cycles and industrial activity. During the winter months from December to February, cooler temperatures and frequent temperature inversions trap pollutants near the ground, creating hazy conditions that peak in January when calm winds and fog exacerbate particulate matter accumulation—this period poses the highest risk for respiratory issues, making outdoor exercise inadvisable for sensitive groups like children and asthma patients. The pre-monsoon summer from March to May brings rising temperatures that increase ozone formation from industrial emissions, though occasional thunderstorms provide temporary cleansing; midday heat makes outdoor activities strenuous, with early mornings offering slightly better air quality. The southwest monsoon from June to September brings substantial rainfall that scrubs the atmosphere, leading to the cleanest air of the year, particularly in July and August when winds from the Arabian Sea disperse pollutants—this is the optimal time for outdoor activities, though humidity may affect those with respiratory conditions. The post-monsoon period from October to November sees gradually deteriorating air quality as rainfall decreases and industrial production intensifies ahead of festival seasons, with particulate matter beginning to accumulate again. Sensitive populations should monitor local air quality reports year-round, use masks during peak pollution periods, and consider indoor air purifiers during winter inversions when textile dyeing activities are most concentrated.