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Sardhana, a town nestled in the Meerut district of Uttar Pradesh, India, occupies a geographically significant position within the Indo-Gangetic Plain. Located at approximately 29.1450° N latitude and 77.6100° E longitude, the town’s terrain is predominantly flat, characteristic of the alluvial plains formed by the Ganges River system. The surrounding landscape is a mosaic of agricultural fields – primarily wheat, sugarcane, and rice – interspersed with smaller villages and pockets of scrubland. This agricultural intensity contributes to seasonal particulate matter, particularly during harvest periods when stubble burning is practiced. Sardhana’s elevation is relatively low, around 218 meters (715 feet) above sea level, which, combined with the flat topography, limits natural air circulation and can exacerbate pollution episodes. The town sits within a gradual urban–rural gradient, transitioning from the denser urban sprawl of Meerut to the more agrarian character of the surrounding countryside. While not directly adjacent to a major river, the proximity to the Ganga basin influences regional weather patterns and contributes to humidity levels. Industrial activity in the broader Meerut region, including sugar mills and small-scale manufacturing, adds to the potential for localized air pollution. The lack of significant topographical barriers means pollutants can readily spread across the plain, impacting Sardhana's air quality. The town's location within a densely populated and agriculturally active region makes it particularly vulnerable to the combined effects of regional and local pollution sources.

Sardhana’s air quality follows a distinct seasonal pattern dictated by the region’s monsoonal climate. The summer months (April-June) are typically characterized by hot, dry conditions and stagnant air, frequently leading to elevated levels of pollutants. Temperature inversions, common during this period, trap emissions close to the ground, worsening air quality. Dust storms originating from the Thar Desert can also significantly impact particulate matter concentrations. The monsoon season (July-September) brings relief, with increased rainfall washing away pollutants and stronger winds dispersing them. However, heavy rainfall can also lead to waterlogging and the release of methane from decomposing organic matter. The post-monsoon season (October-November) is often the most challenging. Agricultural practices, particularly stubble burning after the harvest of crops like rice and wheat, release substantial amounts of smoke and particulate matter, creating a dense haze. Winter months (December-March) are generally colder, with frequent fog episodes that further reduce visibility and trap pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the summer and post-monsoon seasons, limiting outdoor activity during peak pollution times. The months of October and November are particularly concerning, and residents are advised to wear masks and avoid prolonged exposure to outdoor air. During the monsoon, while air quality generally improves, vigilance regarding waterborne diseases is crucial. Maintaining indoor air quality through ventilation and air purifiers can also be beneficial, especially during periods of poor outdoor air quality.