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Sugauna, nestled in the fertile plains of Bihar, India (26.4077° N, 86.2174° E), occupies a geographically strategic yet challenging position for air quality. Situated at a relatively low elevation, approximately 118 meters above sea level, the town experiences minimal topographic influence on wind patterns, often leading to pollutant stagnation. The surrounding landscape is predominantly agricultural, characterized by expansive fields of rice and maize, typical of the Gangetic plains. This intensive agricultural activity contributes to seasonal particulate matter pollution from crop residue burning, a practice common in the region after the harvest season. Sugauna’s proximity to the Indo-Gangetic Plain, a vast alluvial basin, means it’s susceptible to the transport of pollutants from distant industrial hubs and urban centers further north and west. The urban–rural gradient around Sugauna is gradual; small villages and agricultural lands seamlessly blend into the town’s periphery, limiting the buffering effect that a more distinct rural zone might provide. While Sugauna lacks immediate proximity to major rivers, the region’s groundwater table is high, influencing soil moisture and potentially affecting the dispersion of certain pollutants. The flat terrain, combined with the prevailing meteorological conditions, creates a scenario where pollutants tend to accumulate, particularly during periods of low wind speed and temperature inversions. The lack of significant natural barriers exacerbates this issue, making Sugauna vulnerable to regional air pollution episodes.

Sugauna’s air quality follows a distinct seasonal pattern dictated by the monsoon cycle and regional agricultural practices. The pre-monsoon season (March-May) typically witnesses the worst air quality, driven by intense agricultural burning. Farmers clearing crop residue release substantial amounts of particulate matter and gases, significantly impacting local air. Temperature inversions, common during this period, trap pollutants near the ground, exacerbating the problem. 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 activities and vehicular emissions persists. The post-monsoon season (October-November) presents a transitional period. While rainfall decreases, the agricultural burning resumes, creating another peak in pollution levels, often coinciding with Diwali celebrations and associated firework emissions. Winter months (December-February) are generally characterized by colder temperatures and frequent fog, which further restricts atmospheric mixing and traps pollutants. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon and post-monsoon seasons, limiting outdoor exposure and using air purifiers when possible. During periods of heavy fog, even healthy individuals should minimize strenuous outdoor activity. The monsoon offers the most favourable period for outdoor pursuits, though vigilance regarding localized pollution sources remains important. Careful agricultural practices and stricter enforcement of burning regulations are crucial for improving Sugauna’s air quality year-round.