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Pānr, a small town nestled in the Sheohar district of Bihar, India, occupies a geographically significant position within the fertile Gangetic plains. Located at approximately 25.6884° N, 85.7980° E, the town’s terrain is predominantly flat, characteristic of the Indo-Gangetic alluvial plain. The elevation is relatively low, contributing to a tendency for pollutants to accumulate, particularly during periods of atmospheric stability. Pānr’s proximity to the Koshi River, though providing a vital water source, can also influence local weather patterns and, indirectly, air quality. The surrounding landscape is dominated by agricultural land – rice paddies and wheat fields are common – which, during certain seasons, contributes to particulate matter through crop residue burning, a practice unfortunately prevalent in the region. The urban–rural gradient around Pānr is gradual; the town itself is small, with a population of just over 14,000, but it serves as a local market and administrative hub for the surrounding agricultural communities. Further afield, the broader industrial belt of Bihar, concentrated around cities like Muzaffarpur and Samastipur, can contribute to regional air pollution that occasionally impacts Pānr. The flat topography and prevailing wind patterns often result in pollutants originating from these areas being transported towards Pānr, exacerbating local air quality challenges. The lack of significant natural barriers further limits dispersion, making the town susceptible to stagnant air conditions.

Pānr’s air quality follows a distinct seasonal pattern dictated by the region’s monsoon 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) is often characterized by a significant deterioration in air quality. High temperatures and stagnant air, coupled with the practice of crop residue burning after the harvest, lead to elevated levels of particulate matter. Temperature inversions, common during this period, trap pollutants near the ground, worsening the situation. The winter months (November-February) present a different challenge. Cold temperatures and frequent fog significantly reduce visibility and trap pollutants, creating a layer of stagnant air. The lack of wind during these months further inhibits dispersion. Outdoor activities are best avoided during the early morning hours in winter due to dense fog and associated pollution. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise particular caution during the pre-monsoon and winter months. The post-monsoon period (October) generally sees a gradual improvement in air quality as temperatures begin to rise and wind speeds increase, although residual smoke from agricultural practices can still be a factor. Maintaining indoor air quality through ventilation and air purifiers is advisable during periods of poor outdoor air quality.