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Shwebo, nestled in the Sagaing Region of Myanmar, occupies a geographically significant position at the confluence of the Ayeyarwady and Mu rivers. Located approximately 120 kilometers north of Mandalay, it sits within the fertile Sagaing Plain, a gently undulating landscape characterized by alluvial soils deposited over millennia by the Ayeyarwady. The city’s elevation averages around 110 meters above sea level, contributing to a relatively stable atmospheric layer, though susceptible to temperature inversions during cooler months. The surrounding landscape is predominantly agricultural, with extensive rice paddies and other crops dominating the rural areas. This agricultural activity, while vital to the regional economy, can contribute to localized air pollution through the burning of crop residue, particularly during the dry season. Shwebo’s position along major river transport routes has historically fostered trade and limited industrial development, though small-scale workshops and processing facilities exist, primarily related to agriculture. The urban–rural gradient transitions rapidly, with the city’s built environment giving way to agricultural fields within a short distance. The Ayeyarwady River acts as a natural ventilation corridor, potentially dispersing pollutants, but its effectiveness is dependent on prevailing wind patterns. The Mu River, a smaller tributary, contributes to the local microclimate and influences humidity levels. The Sagaing Plain's generally flat terrain can exacerbate the accumulation of pollutants, especially when wind speeds are low, creating conditions ripe for stagnant air and localized poor air quality events.

Shwebo’s air quality experiences a distinct seasonal cycle dictated by Myanmar’s monsoon climate. The monsoon season, typically spanning from May to October, brings frequent rainfall and high humidity, generally leading to improved air quality as precipitation washes away particulate matter and increased moisture traps pollutants. However, intense storms can temporarily elevate dust levels. The dry season, from November to April, presents a more challenging scenario. Reduced rainfall, lower humidity, and increased agricultural burning contribute to a noticeable increase in particulate pollution. Temperature inversions, common during the cooler months of December and January, trap pollutants near the ground, exacerbating the problem. Fog, particularly prevalent in the mornings during the dry season, further restricts atmospheric mixing and concentrates pollutants. February and March often see peak pollution levels due to the combination of agricultural practices and stagnant air. The transitional months of April and May experience variable conditions as the monsoon approaches, with dust storms occasionally impacting air quality. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the dry season, particularly during periods of agricultural burning and fog. Limiting outdoor exertion during peak pollution episodes and utilizing appropriate respiratory protection are advisable. The monsoon rains offer a respite, but vigilance is still necessary, especially following intense storms that can stir up dust.