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Pīr Maker, nestled in the state of Bihar, India, occupies a geographically significant position within the fertile Gangetic plains. Located at approximately 25.9622° N, 85.0257° E, the city’s terrain is predominantly flat, characteristic of the Indo-Gangetic alluvial plain. Its elevation is relatively low, contributing to atmospheric stability and potential for pollutant accumulation. The surrounding landscape is dominated by agricultural fields – primarily rice and maize cultivation – which, while vital for the regional economy, can contribute to seasonal particulate matter through agricultural burning practices. Pīr Maker’s proximity to the Ganges River, though providing a crucial water source, also influences local weather patterns, occasionally leading to humidity and fog, which can trap pollutants. The urban–rural gradient around Pīr Maker is gradual, with small villages and agricultural hamlets blending seamlessly into the city’s periphery. While Pīr Maker itself is a small settlement, it sits within a broader region experiencing increasing urbanization and industrial development. Larger industrial belts, primarily focused on manufacturing and processing, are located within a 50-100 km radius, and their emissions can be transported to Pīr Maker via prevailing winds. The flat topography and limited natural barriers exacerbate the impact of these external pollution sources, making the city particularly vulnerable to regional air quality events. The lack of significant elevation changes also reduces natural dispersion of pollutants, further compounding the issue.

Pīr Maker’s air quality exhibits a distinct seasonal pattern dictated by the region’s monsoonal climate. The dry season, spanning roughly October to May, typically witnesses the poorest air quality. During these months, lower temperatures and reduced wind speeds often lead to temperature inversions, trapping pollutants close to the ground. Agricultural burning, a common practice after the harvest season (October-November), significantly elevates particulate matter concentrations, creating hazy conditions. The winter months (December-January) are particularly challenging, with frequent fog episodes further restricting pollutant dispersion. The monsoon season (June-September) brings a welcome respite, as increased rainfall and stronger winds effectively flush out pollutants. However, even during the monsoon, localized pollution from construction activities and vehicular emissions can still impact air quality. The transitional periods – the pre-monsoon (March-May) and post-monsoon (September-October) – are characterized by variable conditions, with dust storms and increased biomass burning contributing to elevated pollution levels. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of fog or dust storms. Limiting outdoor exertion and wearing appropriate masks are advisable. The pre-monsoon months require heightened awareness due to the potential for agricultural burning and dust events. While the monsoon offers cleaner air, vigilance regarding localized pollution sources remains important. Overall, minimizing exposure during the cooler, drier months is crucial for safeguarding respiratory health in Pīr Maker.