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Sultānpur, nestled in the heart of Madhya Pradesh, India, occupies a geographically significant position within the Bundelkhand region. Located at approximately 23.1381° N latitude and 77.9340° E longitude, the city’s terrain is predominantly characterized by gently undulating plains, typical of the Indo-Gangetic Plain’s southern fringe. The elevation averages around 180 meters above sea level, contributing to a relatively stable atmospheric layer, though susceptible to temperature inversions under specific conditions. Sultānpur is surrounded by a mosaic of agricultural land, primarily dedicated to wheat, soybean, and pulses, interspersed with pockets of scrubland and grasslands. This agricultural activity, while vital to the regional economy, can contribute to seasonal particulate matter pollution, particularly during harvest periods when stubble burning is practiced. The city’s urban footprint is relatively small, reflecting its modest population of 11,507, creating a gradual urban-rural gradient. While not directly adjacent to major rivers, the Betwa River flows approximately 30 kilometers to the north, influencing local humidity and potentially impacting the dispersion of pollutants. The proximity to industrial belts concentrated in Kanpur and Lucknow, roughly 150-200 kilometers away, means that Sultānpur can experience the advection of pollutants from these larger urban centers, especially during periods of stagnant air. The surrounding landscape, largely rural and agricultural, plays a crucial role in both the sources and the potential sinks for airborne pollutants within the Sultānpur microclimate.

Sultānpur’s air quality follows a distinct seasonal pattern dictated by the region’s monsoon climate. The dry season, spanning roughly October to May, presents the most significant air quality challenges. During the cooler months (November-February), temperature inversions frequently trap pollutants near the ground, exacerbating existing emissions. Agricultural practices, including the burning of crop residue after harvest (typically November-December), contribute substantially to particulate matter pollution. The winter months are generally characterized by fog, which further restricts atmospheric mixing and concentrates pollutants. The pre-monsoon period (March-May) sees rising temperatures and increased dust from construction and agricultural activities, leading to elevated levels of particulate matter. The onset of the monsoon season (June-September) brings a dramatic improvement in air quality. The strong winds associated with the monsoon disperse pollutants effectively, and rainfall acts as a natural scrubber, removing particulate matter from the atmosphere. Humidity increases, which can also influence the chemical reactions of pollutants. The months of July and August typically experience the cleanest air. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of fog or stagnant air. Limiting outdoor exertion and wearing appropriate masks can mitigate exposure. The transition periods (October and May) often see fluctuating air quality, requiring vigilance and awareness of local conditions.