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Mūndka, a densely populated locality within Delhi, India, occupies a geographically complex position on the southwestern periphery of the national capital. Situated at approximately 28.68° N latitude and 77.03° E longitude, its coordinates place it within the Indo-Gangetic Plain, a vast alluvial basin characterized by relatively flat terrain. The elevation is modest, around 219 meters (719 feet) above sea level, contributing to atmospheric stability and potential for pollutant accumulation. Mūndka’s location is significantly influenced by its proximity to the Najafgarh drain, a major drainage channel that historically has faced challenges with untreated effluent discharge, impacting local environmental quality. The surrounding landscape transitions from urban sprawl to agricultural zones, particularly towards the west, where fields of wheat and rice are common. This agricultural activity, while vital for regional food security, contributes to seasonal particulate matter pollution through stubble burning practices. To the east and north, Mūndka is enveloped by the expanding urban fabric of Delhi, including industrial areas and residential developments. The urban–rural gradient is rapid, with the city’s influence extending outwards. The region's climate, characterized by hot summers and cool winters, further influences air quality. The lack of significant natural barriers and the prevailing wind patterns often trap pollutants, exacerbating the impact of local emissions and those transported from distant sources, including industrial belts in Haryana and Uttar Pradesh. The flat topography limits dispersion, making Mūndka particularly vulnerable to poor air quality episodes.

Mūndka’s air quality follows a distinct seasonal pattern dictated by meteorological conditions and human activities. The pre-monsoon months (March-May) are typically the most challenging, marked by high temperatures, low wind speeds, and frequent temperature inversions. These inversions trap pollutants near the ground, leading to a significant build-up of particulate matter and other harmful gases. Stubble burning in surrounding agricultural areas intensifies this problem, creating a hazardous environment. The monsoon season (June-September) brings relief, as increased rainfall and stronger winds naturally cleanse the atmosphere. However, even during the monsoon, localized pollution from construction and traffic remains a concern. Post-monsoon (October-November) witnesses a resurgence of poor air quality, mirroring the pre-monsoon conditions, but compounded by the return of agricultural burning. The winter months (December-February) are often characterized by dense fog, which further restricts dispersion and traps pollutants, creating a stagnant and unhealthy atmosphere. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should minimize outdoor activity during these periods, particularly during early morning and late evening hours. Wearing appropriate masks, especially N95 respirators, can offer some protection. Indoor air quality is also crucial; using air purifiers and ensuring proper ventilation can mitigate exposure. Public health advisories are frequently issued during peak pollution periods, urging residents to take precautions and stay informed about air quality conditions.