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Sirsāganj, a small town nestled in the Agra district of Uttar Pradesh, India, occupies a geographically significant position within the Indo-Gangetic Plain. Located at approximately 27.0569° N latitude and 78.6861° E longitude, the town’s terrain is predominantly flat, characteristic of the alluvial plains formed by the Yamuna River and its tributaries. The surrounding landscape is a mosaic of agricultural fields – primarily wheat, sugarcane, and pulses – interspersed with small villages and scattered groves of trees. Sirsāganj’s proximity to Agra, a major urban center and tourist destination, places it within a gradually transitioning urban-rural gradient. While Sirsāganj retains a largely rural character, the influence of Agra’s industrial and commercial activities is increasingly felt. The elevation is relatively low, averaging around 170 meters above sea level, contributing to stagnant air conditions, particularly during cooler months. The Yamuna River, though not directly adjacent to the town, flows within a reasonable distance, influencing local humidity and potentially impacting atmospheric stability. The region’s location within the Gangetic Plain, a densely populated and heavily cultivated area, means that agricultural practices, including stubble burning after harvest, contribute to regional air pollution. Furthermore, the town’s position downwind of industrial belts in Agra and surrounding areas exposes it to pollutants transported by prevailing winds, exacerbating local air quality challenges. The flat topography limits natural ventilation, trapping pollutants and contributing to a localized build-up.

Sirsāganj’s air quality follows a distinct seasonal pattern dictated by the region’s monsoonal climate. The monsoon season, typically from July to September, brings relief with increased rainfall, which naturally washes pollutants from the atmosphere, leading to improved air quality. However, the preceding pre-monsoon months (April-June) often witness a significant deterioration. Rising temperatures and decreasing wind speeds create conditions conducive to temperature inversions, trapping pollutants near the ground. Agricultural activities, particularly the burning of crop residue after the harvest of wheat and mustard, contribute heavily to particulate matter pollution during this period. Winter months (November-February) are generally the most challenging. Cold temperatures, fog, and low wind speeds further exacerbate the inversion layer, leading to prolonged periods of poor air quality. The dense fog, common during these months, not only reduces visibility but also traps pollutants, intensifying their impact. Spring (March) offers a slight improvement as temperatures begin to rise, but the lingering effects of winter pollution and the start of agricultural burning can still impact air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should limit outdoor activity during the pre-monsoon and winter months, especially on days with dense fog. Wearing masks and avoiding strenuous activity can also help mitigate exposure. Maintaining indoor air quality through ventilation and air purifiers is advisable during periods of elevated pollution.