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Senduriā, nestled in the fertile plains of Bihar, India, occupies a geographically significant position within the Gangetic Basin. Located at approximately 26.7469° N, 84.6754° E, the city’s terrain is predominantly flat, characteristic of the Indo-Gangetic Plain, with an elevation of roughly 128 meters above sea level. This low-lying topography contributes to a tendency for pollutants to accumulate, particularly during periods of atmospheric stability. The surrounding landscape is dominated by agricultural fields – primarily rice and maize cultivation – which, while vital to the regional economy, can contribute to particulate matter through seasonal burning practices. Senduriā’s proximity to the North Koel River, though providing a source of water, doesn't significantly influence air quality due to the prevailing wind patterns and the relatively small scale of the river's impact on local meteorology. The urban–rural gradient around Senduriā is gradual, with small villages and agricultural hamlets blending seamlessly into the urban fabric. While Senduriā itself is a small town, it sits within a broader region experiencing increasing industrial activity, particularly in nearby districts focused on brick kilns and small-scale manufacturing. This regional industrial belt introduces pollutants that can be transported to Senduriā via prevailing winds. The flat terrain and lack of natural barriers exacerbate the impact of these pollutants, making the city vulnerable to poor air quality episodes, especially during drier periods when wind speeds are lower.

Senduriā’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 as frequent rainfall and strong winds effectively flush the atmosphere. However, the pre-monsoon period (March-May) often witnesses a significant deterioration in air quality. This is due to a combination of factors: rising temperatures leading to increased ozone formation, agricultural burning of crop residue, and the prevalence of temperature inversions, where a layer of warm air traps cooler air near the ground, preventing pollutants from dispersing. Dust storms originating from the arid regions of Rajasthan can also impact air quality during this period. The post-monsoon season (October-November) is characterized by calmer winds and cooler temperatures, which, while pleasant, can lead to a build-up of pollutants, particularly particulate matter from local sources. Fog is common during these months, further trapping pollutants close to the ground. Winter months (December-February) generally see improved air quality compared to the pre-monsoon period, although localized pollution from residential heating and vehicle emissions can still be a concern. Sensitive groups, including children, the elderly, and individuals with respiratory conditions, should exercise caution during the pre-monsoon and post-monsoon seasons, limiting outdoor activity during peak pollution hours and wearing appropriate masks when necessary. Maintaining indoor air quality through ventilation and air purifiers is also advisable during periods of poor air quality.