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Mundāhal Khurd, nestled within the state of Haryana, India, occupies a relatively flat, alluvial plain at approximately 28.9800°N, 76.1950°E. This location places it within the Indo-Gangetic Plain, a vast and fertile region, but also one prone to air stagnation. The surrounding landscape is predominantly agricultural, characterized by intensive farming of wheat, rice, and sugarcane. This agricultural activity, while vital to the regional economy, contributes significantly to air pollution through stubble burning post-harvest, particularly in October and November. The city’s elevation is low, around 220 meters, which limits natural dispersion of pollutants. While not directly adjacent to a major body of water, the proximity to the Yamuna River, approximately 30km to the east, influences local humidity and can contribute to fog formation during winter months, exacerbating pollution. Mundāhal Khurd is situated within a rapidly urbanizing corridor between Delhi and several industrial towns in Haryana, experiencing an increasing urban-rural gradient. This growth brings increased vehicular traffic and construction activity, adding to the particulate matter load. The lack of substantial natural windbreaks further compounds the issue, making the city susceptible to trapping pollutants. The regional climate is semi-arid, with hot summers and cool, dry winters.

Air quality in Mundāhal Khurd follows a distinct seasonal pattern. The summer months (April-June) see relatively better air quality due to strong convective winds that help disperse pollutants, though dust storms can temporarily elevate particulate matter. However, temperatures soar, posing health risks, particularly for the elderly. The monsoon season (July-September) brings relief with rainfall washing away pollutants, offering the cleanest air of the year. Post-monsoon, October and November are critical months, witnessing a dramatic deterioration in air quality due to widespread stubble burning from agricultural lands surrounding the city. This creates a dense haze, severely impacting respiratory health. Winter (December-February) is characterized by temperature inversions, trapping pollutants near the ground and leading to prolonged periods of poor air quality, compounded by fog. January is typically the worst month. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit outdoor activity during these peak pollution periods. Wearing masks (N95 or equivalent) is strongly advised. During the summer, hydration and avoiding peak heat hours are crucial. The monsoon offers a window for outdoor activities, but vigilance regarding waterborne diseases is necessary.