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Nasrullāhganj, a municipality in the Sehore district of Madhya Pradesh, India, occupies a central position within the Malwa Plateau. Its coordinates (22.6837°N, 77.2707°E) place it within a relatively flat, undulating terrain, typical of the region. The landscape is predominantly rural, characterized by agricultural lands dedicated to wheat, soybean, and cotton cultivation. The Kolar River flows nearby, influencing local microclimates and potentially contributing to humidity levels that can affect pollutant dispersion. While not directly within a major industrial belt, Nasrullāhganj serves as a market town for surrounding agricultural produce, leading to increased vehicular traffic and localized dust generation from transport and processing activities. The urban-rural gradient is pronounced; the municipality itself is a concentrated area of activity, while the surrounding areas are sparsely populated agricultural fields. This creates a dynamic where pollutants generated within the town can impact the immediate rural environment, and conversely, agricultural practices like stubble burning can contribute to air pollution within Nasrullāhganj. The elevation is approximately 520 meters above sea level, influencing temperature variations and atmospheric stability. The lack of significant natural barriers to air flow means the town is susceptible to regional pollution transport.

Nasrullāhganj experiences a distinct seasonal air quality pattern dictated by the monsoon and post-monsoon periods. The summer months (March-May) see rising temperatures and dry conditions, leading to increased dust suspension from agricultural fields and construction activities, worsening air quality. May is typically the worst month before the monsoon. The arrival of the monsoon in late June/early July brings a temporary respite, as rainfall washes away particulate matter and increased humidity suppresses dust. However, stagnant air during periods of reduced rainfall within the monsoon season can still lead to localized pollution build-up. Post-monsoon (October-November) is often the most challenging period. Cooler temperatures create temperature inversions, trapping pollutants near the ground, and the practice of agricultural stubble burning in surrounding areas significantly degrades air quality. December-February brings cooler, drier air, with pollution levels generally lower than post-monsoon but still elevated due to domestic fuel burning and vehicular emissions. Sensitive groups – children, the elderly, and those with respiratory conditions – should limit outdoor activity during October-November and take precautions during summer months. Avoiding peak traffic hours and using masks can offer some protection.