Aurangābād Air Quality Index (AQI)

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Aurangābād, Bihar, situated at approximately 24.7°N, 84.35°E, occupies a geographically significant position within the fertile plains of the Indo-Gangetic Basin. The city’s terrain is predominantly flat, characteristic of the Gangetic plains, with an average elevation of around 58 meters above sea level. This low elevation contributes to atmospheric stability, often exacerbating pollution accumulation, particularly during periods of stagnant air. Aurangābād lies within a region heavily influenced by the monsoon climate, bordered by agricultural lands that extend outwards, creating a gradual urban-rural gradient. The surrounding landscape is dominated by agricultural fields, primarily cultivating rice and maize, which, during harvest seasons, can contribute to particulate matter through burning agricultural residue – a common practice impacting regional air quality. While Aurangābād isn't directly adjacent to a major river, its proximity to the Sone River basin influences local humidity and weather patterns. The city’s regional position places it within a corridor experiencing significant industrial activity, with several small-scale manufacturing units and brick kilns operating in the surrounding areas. These industries, coupled with vehicular emissions from a growing population, contribute to localized pollution hotspots. The flat topography and prevailing wind patterns often trap pollutants, hindering their dispersion and leading to elevated concentrations, especially during cooler months when temperature inversions are more frequent. The lack of significant natural barriers further limits the city’s ability to naturally cleanse its air.

Aurangābād’s air quality follows a distinct seasonal pattern dictated by its monsoon-influenced climate. The monsoon season, typically spanning from June to September, brings relief from accumulated pollutants due to frequent rainfall and increased wind speeds, effectively flushing the atmosphere. However, the pre-monsoon period (March-May) often witnesses a sharp deterioration in air quality. Rising temperatures lead to increased ozone formation, and stagnant air conditions, frequently accompanied by fog, trap pollutants near the ground. Agricultural burning, intensifying during this period, significantly contributes to particulate matter. The post-monsoon season (October-November) presents a transitional phase, with cooler temperatures and calmer winds, which can again lead to pollutant accumulation. Winter months (December-February) are generally the most challenging, characterized by temperature inversions – a phenomenon where a layer of warm air sits above cooler air, preventing vertical mixing and trapping pollutants close to the surface. This, combined with reduced sunlight hours and increased use of biomass for heating, results in prolonged periods of poor air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during these months, limiting outdoor activities and wearing appropriate masks. During the monsoon, while overall air quality improves, heavy rainfall can still lead to localized flooding and associated waterborne illnesses, requiring vigilance. The transition periods, particularly pre-monsoon and post-monsoon, demand heightened awareness and proactive measures to mitigate exposure.